China DCS: Ship Energy Reporting Regime

China runs a mandatory ship fuel-consumption and carbon-intensity reporting regime that sits alongside, but is distinct from, the global IMO DCS and the EU MRV. The current instrument is the Measures for the Management of Ship Energy Consumption Data and Carbon Intensity (MHF 2022 No. 164), issued by the China Maritime Safety Administration (China MSA) on 24 November 2022 and in force from 22 December 2022. It is valid for five years.

MHF 2022 No. 164 replaced the 2018 Measures for the Collection and Management of Ship Energy Consumption Data and elevated the scope: it now covers vessels of 400 GT and above (both Chinese-flagged and foreign-flagged) calling Chinese ports, and it folds in a carbon-intensity management layer for Chinese-flagged vessels on international voyages. The companion technical standard is JT/T 1340 (Technical Requirements for Ships Energy Consumption Data Collection and Reporting), which specifies the data elements and methods.

The CCS MRV China calculator implements the per-voyage fuel consumption calculation that feeds the China MSA reporting portal. The IMO DCS annual report calculator covers the parallel global obligation that most vessels subject to MHF 2022 No. 164 also carry; the SOx calculator and PM10/PM2.5 calculator support the DECA sulphur-compliance calculations needed alongside data reporting.

Regulatory history: from 2018 measures to the 2022 regime

The 2018 foundation

The Ministry of Transport’s 2018 Measures for the Collection and Management of Ship Energy Consumption Data established the first mandatory framework for ship energy-consumption data collection in China. It introduced the requirement for vessels on domestic routes and at Chinese ports to record fuel consumption in logbooks consistent with SEEMP requirements, and it designated Shanghai MSA as the national body responsible for statistics, analysis, and verification of the data across all Chinese ports.

That 2018 instrument did not integrate carbon-intensity rating or the MARPOL Annex VI CII framework, which had not yet been adopted internationally. It also applied a higher GT threshold than the 2022 successor.

November 2022 revision: MHF 2022 No. 164

The 2022 revision addressed three gaps. First, it lowered the GT threshold to 400 GT, pulling in a large number of smaller coastal and inter-port vessels. Second, it introduced a carbon-intensity dimension for Chinese-flagged vessels on international voyages, aligning with the CII framework under MARPOL Annex VI Regulation 28 while creating a parallel Chinese domestic obligation. Third, it specified the reporting mechanism: vessels must use the China MSA reporting portal during departure port formalities.

The 2022 measure was timed partly to align with the enhanced IMO DCS reporting requirements and the EU MRV’s expansion to include CH4 and N2O (effective from 2024 under EU Regulation 2023/957). China MSA stated it intends to update the measure before its five-year validity expires in late 2027.

Technical standard JT/T 1340

JT/T 1340 is the transportation-industry technical standard specifying which energy consumption parameters must be collected and in what form. Vessels record data in the ship’s logbook or other relevant documents per SEEMP requirements. The standard covers fuel type, quantity consumed, voyage distance, and time under way. For vessels using LNG or dual-fuel systems, the standard specifies how methane slip estimates are to be recorded; for vessels using scrubbers (exhaust gas cleaning systems), it specifies the fuel-sulphur equivalent needed for DECA compliance records.

Applicability: who must comply

400 GT threshold for data recording

MHF 2022 No. 164 applies to Chinese-flagged and foreign-flagged vessels of 400 GT and above that enter or exit Chinese ports, with three exceptions: military vessels, fishing vessels, and sports vessels. The 400 GT threshold is lower than the 5,000 GT floor used by both the IMO DCS and the original EU MRV, though the EU MRV was extended to general cargo ships of 400-5,000 GT and offshore vessels of 400 GT and above from 1 January 2025 under Regulation 2023/957.

For foreign-flagged vessels, the core obligation under MHF 2022 No. 164 is practical: fuel consumption data from the previous voyage must be reportable at departure clearance, and records must be retained on board for at least two years and available for China MSA inspection.

5,000 GT Chinese-flagged vessels: annual reporting plus carbon intensity

For Chinese-flagged vessels of 5,000 GT and above on international voyages, MHF 2022 No. 164 adds a layer that mirrors the IMO DCS annual cycle. These vessels must submit an annual energy consumption data report by 31 March of the following year, consistent with both the IMO DCS deadline (MARPOL Annex VI Reg. 27) and the EU MRV deadline (31 March under Regulation 2015/757 as amended). The class society, usually China Classification Society (CCS), verifies the data before it is submitted to China MSA through the authorized reporting pathway.

The carbon-intensity management provisions in MHF 2022 No. 164 apply to this same category of Chinese-flagged vessels. Those provisions require that an International Energy Efficiency Certificate and verified SEEMP are current, consistent with MARPOL Annex VI Regulations 26 and 28.

What the measure does not cover

MHF 2022 No. 164 does not itself specify the sulphur limits that apply in Chinese DECAs. DECA sulphur compliance is governed by the separate MOT Implementation Scheme of November 2018, described in the next section. The two regimes interact: vessels bunkering low-sulphur fuel for DECA compliance generate the BDN records that feed the energy consumption data report, so operationally they run together.

China’s Domestic Emission Control Areas (DECAs)

Legal basis and geographic scope

China’s DECAs are declared under Chinese domestic law, specifically the MOT Implementation Scheme for Domestic Emission Control Areas for Atmospheric Pollution from Vessels (November 30, 2018). They are not formally designated as IMO Emission Control Areas under MARPOL Annex VI, though they apply equivalent or stricter sulphur limits within Chinese waters. Enforcement is by China MSA.

The scheme covers three main coastal zones, two inland-river zones, and a separate Hainan coastal zone.

Coastal DECAs (the three main zones):

• Pearl River Delta coastal area: Guangdong Province maritime zone including the ports of Shenzhen (Yantian, Shekou, Dachan Bay), Guangzhou (Nansha, Huangpu), Zhuhai, and the approaches to the Hong Kong Special Administrative Region.
• Yangtze River Delta coastal area: Shanghai and the maritime zones of Zhejiang and Jiangsu provinces, covering the ports of Shanghai, Ningbo-Zhoushan, Suzhou (Taicang), Nantong, and Lianyungang.
• Bohai Rim coastal area: the semi-enclosed Bohai Sea and Yellow Sea coast of Tianjin, Hebei, and Liaoning provinces, covering Tianjin, Tangshan (Caofeidian), Qinhuangdao, Yingkou, and Dalian.

Inland river DECAs cover the Yangtze River navigable section and the Xi Jiang (West) River, applying a stricter 0.1% m/m sulphur limit.

Hainan coastal waters: a separately designated zone covering the territorial sea and ports of Hainan Province (Haikou, Sanya, Yangpu).

Sulphur limits by zone and date

From 1 January 2019, all sea-going vessels within the coastal DECAs (Pearl River Delta, Yangtze River Delta, Bohai Rim) and in Hainan coastal waters must use fuel with a sulphur content at or below 0.5% m/m. This 0.5% limit aligns with the global IMO 2020 sulphur cap on international voyages but predates it by one year for Chinese coastal waters.

From 1 January 2020, the inland river DECAs (Yangtze River, Xi Jiang) apply a limit of 0.1% m/m, the same standard as IMO-designated Emission Control Areas (ECAs) under MARPOL Annex VI Regulation 14.

From 1 January 2022, the Hainan coastal zone tightened to 0.1% m/m, matching the inland-river limit. The November 2018 implementation scheme had committed to evaluate extending the 0.1% limit to all coastal DECAs; as of 2026, a feasibility study was conducted ahead of a potential 1 January 2025 decision, but no public formal announcement confirming or extending the 0.1% limit to all coastal DECAs has been confirmed by MOT in available sources.

Compliance methods

The 2018 scheme explicitly permits exhaust gas cleaning systems (scrubbers) as an alternative to low-sulphur fuel, subject to discharge monitoring. The scrubber must have a control system installed and any wash-water discharges must meet applicable Chinese regulations. In practice, most scrubber-equipped vessels operating in Chinese waters use open-loop scrubbers when at sea and switch to compliant fuel or close-loop scrubber mode in port, consistent with discharge restrictions at Chinese terminals.

Alternative fuels, including LNG, are also accepted as compliant with DECA sulphur limits.

Relationship to IMO ECAs and emission control areas

The Chinese DECAs are formally distinct from IMO-designated ECAs. The four IMO ECAs in force are the Baltic Sea ECA, the North Sea ECA, the North American ECA, and the United States Caribbean Sea ECA, all applying 0.1% m/m sulphur and (for the North American and Caribbean ECAs) Tier III NOx limits. China has not submitted an MARPOL Annex VI Appendix VII application to have its coastal zones formally recognized as IMO ECAs, though the DECA sulphur limits broadly match IMO ECA standards.

The Chinese coastal DECA is less stringent than an IMO ECA on sulphur for vessels underway in coastal waters (0.5% vs 0.1%), but it applies to a much larger fleet and port set than any single IMO ECA.

Reporting obligations: what operators must do

Per-voyage reporting at departure clearance

For any vessel of 400 GT and above, including foreign-flagged vessels, the energy consumption data from the previous voyage must be reported to China MSA before or during departure clearance from a Chinese port. The report is submitted via China MSA’s maritime information platform (the reporting portal). Gard and NorthStandard both note that the portal does not have an English-language interface, so operators without Chinese-language capability rely on local port agents to submit on their behalf.

The data must be consistent with the records in the ship’s logbook or relevant supporting documents, maintained per SEEMP requirements and JT/T 1340.

Annual aggregate report: Chinese-flagged vessels of 5,000 GT and above

Chinese-flagged vessels of 5,000 GT and above on international voyages submit an annual aggregate fuel consumption report to China MSA by 31 March of the following year. This deadline aligns with the IMO DCS annual deadline under MARPOL Annex VI Regulation 27.

For these vessels, CCS (or another China-MSA-accredited verifier, which can include DNV, Lloyd’s Register, or ABS operating under Chinese MSA authorization) verifies the data before submission. The verifier issues a Statement of Compliance analogous to the Document of Compliance issued under the IMO DCS.

Data must be retained on board for at least two years and made available to China MSA inspectors on request.

SEEMP alignment

Vessels calling Chinese ports are expected to have a valid Ship Energy Efficiency Management Plan (SEEMP) per MARPOL Annex VI Regulation 26. For Chinese-flagged vessels on international voyages, SEEMP Part III (the CII operational plan under MEPC.346(78)) must also be current. The SEEMP is the container that holds the methodology used for data collection under both JT/T 1340 and the IMO DCS; the Chinese regime does not require a separate planning document but cross-checks against the SEEMP on inspection.

Verification and enforcement

China MSA’s role and Shanghai MSA as data hub

MHF 2022 No. 164 designates Shanghai MSA as the national coordinating authority for statistics, analysis, and verification of all ship energy consumption data submitted across China. Local MSA offices at each port handle the per-voyage reporting at departure clearance; Shanghai MSA aggregates and analyses the national picture.

China MSA is a member of the Tokyo Memorandum of Understanding on Port State Control. PSC inspectors at Chinese ports verify, as a standard inspection item: that the vessel has a valid SEEMP on board, that departure-clearance energy data have been filed, and that fuel consumption records are consistent with BDN records and the engine logbook. Cross-checking between reported fuel consumption and BDNs is the primary method for identifying under-reporting.

Third-party verification for annual reports

For Chinese-flagged vessels subject to annual reporting, the verifier examines the same data sources a vessel’s master uses to compile the SEEMP Part II annual report: BDNs, ROB surveys, fuel transfer records, and the engine logbook. CCS is the principal verifier for Chinese-flagged vessels, though other accredited bodies can act. The process parallels the IMO DCS verification by a Recognized Organization, but the MHF 2022 measure adds an explicit requirement for the data to be confirmed before submission to China MSA (rather than leaving verification with the flag administration, as the IMO DCS does).

Penalties

Penalties under MHF 2022 No. 164 are currently set at approximately CNY 2,000 (around USD 280 at mid-2024 exchange rates) for failure to report energy consumption data. Both Gard and NorthStandard have flagged that this level is low relative to the administrative significance of the obligation and that authorities have stated penalties will increase materially following revision of China’s Marine Environmental Protection Law. Correction of inaccurate data is required within three working days of a deficiency notice.

For DECA sulphur violations, the regulatory framework carries higher exposure. The 2018 implementation scheme references fines and the possibility of detention for non-compliant fuel use; in practice, China MSA fuel sampling during PSC inspections at DECA ports has been routine since 2019.

Three-regime comparison: IMO DCS, EU MRV, and China MHF 2022

Ships that trade between China and Europe carry simultaneous obligations under three distinct data-collection regimes. The regimes share a common data spine (fuel consumption by voyage) but differ in threshold, scope of pollutants, verification chain, public disclosure, and enforcement level.

What the table means for an operator

A containership of 8,000 GT flagged in a non-EU, non-Chinese country, running a round voyage from Shanghai to Rotterdam:

• China MHF 2022 No. 164: reports previous-voyage fuel consumption data at departure clearance from Shanghai. If calling Chinese ports on the inbound leg too, files again at departure.
• EU MRV (Reg. 2015/757): files a voyage-level MRV report for the full voyage to Rotterdam and the return leg, including the portions within the EEA and the mandatory 50% of the extra-EEA segment. Annual emission report verified and submitted to THETIS-MRV by 31 March. The report now includes CH4 and N2O.
• IMO DCS (MARPOL Annex VI Reg. 27): annual aggregate fuel consumption data collected per SEEMP Part II, verified by flag administration or RO, submitted by 31 March.

All three obligations use the same underlying fuel-consumption records (BDNs, ROB surveys, flow-meter data), so the practical compliance burden centers on data management: maintaining a single internal dataset that can be formatted for each of the three reporting systems. The three regimes do not share a common electronic submission platform. Operators typically use fleet management software that generates the three report formats from a shared voyage-data record, or rely on their class society to handle all three submissions.

Where the regimes diverge on verification quality

IMO DCS verification is the weakest of the three: the flag administration may authorize an RO to verify, but the methodology allows considerable flexibility and there is no third-party accreditation requirement analogous to the EU MRV or China MSA schemes. EU MRV verification is the most standardized: the European Commission mandates accreditation under Regulation (EU) 2016/1628 criteria, and THETIS-MRV provides a public check on reported data. China MHF 2022 verification for annual reports is mandatory third-party for Chinese-flagged vessels, using CCS or another accredited body, but per-voyage reporting for foreign vessels relies on self-declaration through the portal.

IMO DCS: MARPOL Annex VI Regulation 27 in depth

Mandatory scope and data elements from 2019

MARPOL Annex VI Regulation 27, as introduced by resolution MEPC.278(70) and in force from 1 March 2018 with the first reporting year being calendar year 2019, requires ships of 5,000 GT and above on international voyages to collect and report fuel oil consumption data for each calendar year. The regulation applies regardless of flag and covers every such vessel calling at a port of a MARPOL Annex VI Party.

The data elements prescribed by MARPOL Annex VI Regulation 27 and the associated Data Collection Plan template (MEPC.1/Circ.795/Rev.7) are: fuel oil consumption by type (the fuel types correspond to the standard mass-based CO2 conversion factors in Regulation 2 and Resolution MEPC.308(73)), distance travelled over ground, and hours under way. Those three parameters are the minimum; flag administrations may collect supplementary data, but the global standard does not require deadweight or cargo quantities at the voyage level. The data are compiled annually, per SEEMP Part II methodology (MEPC.346(78)), and cover the full calendar year.

Verification sits with the flag administration or its authorized Recognized Organization. The verifier reviews BDNs, flow-meter records, ROB surveys, and the engine logbook. When satisfied, it issues a Statement of Compliance (SoC) for the ship. The ship must carry a current SoC at all times after the first reporting deadline. Under Resolution MEPC.292(71), the SoC deadline for the initial year was 31 May 2020 (for the 2019 data year); since then the SoC is issued as part of SEEMP Part II annual verification, usually by 31 May or as specified by the flag administration.

GISIS aggregation and the IMO annual summary

After the flag administration collects verified SoCs from its fleet, it submits annual aggregate data to the IMO’s Global Integrated Shipping Information System (GISIS) module for data collection. The GISIS dataset is public, but only as flag-level aggregates: total fuel consumption by flag, broken down by ship type and GT bracket. Individual vessel data are not disclosed. The IMO secretariat publishes an annual summary of global shipping fuel consumption and estimated CO2, drawn from the GISIS aggregate, which feeds into IMO’s GHG studies. The public number for 2022 shipping CO2 was approximately 735 million tonnes, derived from this aggregation pathway.

This anonymized, aggregate approach differs from both the EU MRV and China MHF 2022 in the same direction: the IMO DCS cannot be used to check the reported performance of a specific vessel or operator, which is a structural limitation for regulatory scrutiny.

Interaction with the SEEMP

The SEEMP Part II document is the container for the IMO DCS data-collection plan and annual report. SEEMP Part II must specify the collection methodology for each data element (fuel type, quantity method, distance method, hours-under-way method), the person responsible for data collection, the record-keeping location, and the verification procedure. An auditor reviewing a vessel’s IMO DCS compliance checks SEEMP Part II first; data inconsistent with the stated methodology in Part II are non-compliant even if the underlying numbers are accurate. The MARPOL Annex VI/26 SEEMP calculator supports building and checking the SEEMP Part III (CII) structure for Chinese-flagged vessels and for any fleet that trades under both IMO DCS and China MHF 2022.

EU MRV and EU ETS: the European layer in depth

Regulation 2015/757 as amended by Regulation 2023/957

The EU MRV scheme was established by Regulation (EU) 2015/757 on the monitoring, reporting, and verification of CO2 emissions from maritime transport, in force from 2016 and with first reporting for the 2018 calendar year. The scheme was significantly amended by Regulation (EU) 2023/957, which entered force on 5 May 2023, with key changes applying from 1 January 2024.

The amended regulation extends the scope to CH4 and N2O alongside CO2 from 2024. It also expands the fleet coverage to include general cargo ships and offshore vessels between 400 GT and 5,000 GT from 1 January 2025. And it aligns the MRV scheme with the EU ETS for shipping, which began applying to maritime allowances from 2024 under Directive 2003/87/EC as amended.

Per-voyage granularity and the 50% rule

The EU MRV is unique among the three regimes in mandating per-voyage reporting, not just annual aggregates. For each voyage to or from an EU port, the operator must report: port of departure, port of arrival, departure date and time, arrival date and time, distance, time at sea, cargo (deadweight or passenger count depending on ship type), fuel consumption for CO2 per fuel type, and from 2024 the CH4 and N2O emissions per fuel type (using GWP100 conversion factors from the IPCC Fifth Assessment Report). Both the portion within EU waters and 50% of the extraterritorial leg between an EU port and a non-EU port count toward the MRV obligation. A Shanghai-to-Rotterdam voyage therefore contributes 50% of the fuel burned on the extra-EEA segment to the EU MRV tally.

The per-voyage data are rolled up into an Annual Emissions Report, verified by a third-party accredited verifier, and submitted to the THETIS-MRV portal by 31 March of the following year. The operator receives a Document of Compliance once the report is accepted.

THETIS-MRV and public per-ship data

EMSA (European Maritime Safety Agency) operates the THETIS-MRV information system. It accepts voyage-level MRV reports, aggregates them into annual emission reports, and publishes the verified annual emission data for every ship at the per-vessel level. Any member of the public can look up the total CO2 (and from 2025 reporting year, CH4 and N2O) emitted by a specific vessel in a given calendar year, the transport work (cargo-distance product), and the ship’s resulting carbon intensity in g CO2e/tonne-nm. This public disclosure is the single sharpest difference in transparency between EU MRV and the other two regimes.

The public data feed is both a compliance-monitoring tool and a market signal: charterers, banks providing sustainability-linked loans, and cargo owners can read a vessel’s historic EU MRV data directly from THETIS-MRV without relying on owner disclosure.

Link into EU ETS and FuelEU Maritime

From 1 January 2024, ships of 5,000 GT and above are required to surrender EU ETS allowances for their verified MRV emissions: 40% of 2024 emissions, 70% of 2025 emissions, and 100% from 2026. The verified Annual Emissions Report in THETIS-MRV is the measurement basis for the ETS surrender obligation. The EU MRV to EU ETS crosswalk calculator and the EU ETS cost calculator both use the MRV-verified CO2 figure as input.

FuelEU Maritime (Regulation (EU) 2023/1805), applying from 1 January 2025, sets a binding carbon intensity limit on the energy mix used on EU voyages and at EU berths, measured in g CO2e/MJ. It uses the same MRV infrastructure (the same monitoring plan and THETIS-MRV) as the basis for its compliance assessment. A ship already submitting EU MRV voyage data does not need a separate monitoring process for FuelEU; the same data stream feeds both obligations.

Data confidentiality and public access across the three regimes

The transparency gradient

The three regimes sit at very different points on the public-disclosure spectrum:

IMO DCS (MARPOL Annex VI Reg. 27) publishes only flag-level aggregates through GISIS. Individual vessel data are confidential to the flag administration and verifier. The rationale, as stated in MEPC deliberations, is that individual consumption data are commercially sensitive, particularly for charter negotiations and competitive intelligence. The consequence is that enforcement can only occur through the flag administration: there is no external check on whether a vessel’s self-reported BDN volumes are plausible relative to its size and trading pattern, except as the flag chooses to investigate.

EU MRV publishes per-ship, per-year verified emission data through THETIS-MRV. The rationale stated in Regulation 2015/757 is that transparency enables market mechanisms and investor scrutiny to complement regulatory enforcement. In practice, the public data have been used in academic studies benchmarking fleet carbon intensity, in charterer sustainability questionnaires, and in NGO shipping emission inventories. The verified data are the least manipulable of the three datasets because an accredited third-party verifier must certify every annual report before EMSA accepts it.

China MHF 2022 treats all submitted data as an internal government resource. China MSA does not publish a per-vessel database. There is no confirmed mechanism for third parties, including foreign port-state control organizations, to query China MSA’s database about a specific vessel’s reported consumption history. The data are used internally for policy analysis (Shanghai MSA aggregates and publishes fleet-level statistics on Chinese domestic waterway transport annually, though the methodology and granularity for MHF 2022 No. 164 data specifically have not been disclosed in publicly accessible documents as of 2026).

Practical implication for triple-reporting vessels

A vessel trading China-Europe-global faces three separate disclosure environments for what is substantially the same underlying data. Its EU MRV Annual Emissions Report is public; its IMO DCS contribution is folded into an anonymous flag aggregate; its China MSA per-voyage filings are internal to China MSA. This asymmetry means that a charterer or bank can verify the vessel’s EU-reported carbon performance but cannot independently verify the China-reported data or the IMO DCS aggregate. Internal consistency between the three datasets remains the operator’s discipline, not a structural requirement enforced by cross-regime data sharing. The EU MRV emissions calculator and the IMO DCS annual report calculator support building the parallel datasets needed from a single shared voyage-data record.

DECA compliance in practice: fuel management at Chinese ports

Fuel changeover timing

Vessels approaching Chinese coastal DECAs must complete a fuel changeover to 0.5% m/m (or better) fuel before entering the DECA boundary. The requirement is not an at-berth rule: it applies on entry to the DECA, which extends to the territorial sea baseline. Vessels using heavy fuel oil on the open ocean need to switch to marine gas oil or a compliant low-sulphur fuel oil on approach. The BDN and engine logbook must record the timing of the changeover.

For inland-river and Hainan operations, the changeover to 0.1% fuel is required before entering the respective zone. In the Yangtze River, the practical approach point is typically the river entrance at the port of Shanghai’s approaches or upstream of Wusong.

Scrubber use in Chinese ports

Open-loop scrubber discharge is permitted in Chinese coastal DECA waters unless a specific port has issued a discharge prohibition notice. As of 2024, Shanghai’s Yangshan container terminal and several Tianjin berths have issued local discharge restrictions. Vessels using open-loop scrubbers in those terminals must switch to compliant fuel at berth or operate in closed-loop or hybrid mode. This is a practical operational consideration distinct from the DECA sulphur compliance rule itself.

BDN as the compliance document

China MSA PSC inspectors treat the BDN as the primary compliance document for both DECA sulphur compliance and energy consumption data reporting. The BDN must show: date and place of bunkering, fuel quantity, type, and ISO 8217 specification including sulphur content. Cross-checking BDN volumes against ROB surveys and engine consumption logs is the standard inspection technique. The BDN reconciliation calculator and FONAR calculator are useful tools for verifying that on-board records are internally consistent before a China MSA PSC inspection.

Carbon intensity for Chinese-flagged vessels

Domestic carbon intensity rating

MHF 2022 No. 164 introduces a carbon-intensity layer for Chinese-flagged vessels of 5,000 GT and above on international voyages. The provisions require these vessels to hold a valid International Energy Efficiency Certificate (IEEC) and a verified SEEMP, consistent with MARPOL Annex VI Regulations 22, 24, and 26-28.

The Chinese MSA regime does not (as of 2026) establish a separate domestic CII rating scale distinct from the IMO CII A-to-E scale; it applies the MARPOL Annex VI CII framework to Chinese-flagged vessels and adds the energy consumption data reporting layer. The CII attained calculator and CII rating calculator implement the calculation for the IMO CII framework that Chinese-flagged vessels must also satisfy.

Shipping’s exclusion from the China national ETS

The China national Emissions Trading System (China ETS), operational for the power generation sector since 2021 and expanded to steel, cement, and aluminum from 2025, does not include the shipping sector as of 2026. Peer-reviewed literature published in 2023 confirms that shipping “has not yet been included” despite pilot carbon trading programs having run in seven Chinese provinces since 2011. Shanghai’s port authority conducted voluntary carbon trading exploration for shipping from 2015, but no national mandatory maritime carbon price has been established.

This contrasts with the EU ETS Maritime, which applied to 40% of allowances surrendered for voyages in 2024, rising to 70% in 2025 and 100% from 2026, and with the IMO’s Net-Zero Framework (GFI and associated Maritime Contribution mechanism, adopted in principle at MEPC 83 in April 2025). Whether China will eventually link a domestic maritime carbon price to the IMO framework or develop a parallel instrument remains uncertain; no official timeline has been confirmed by China’s Ministry of Ecology and Environment or Ministry of Transport.

Shore power in Chinese ports

China has constructed a large shore-power infrastructure since 2018, with state subsidies covering a significant share of the capital cost for port-side substations at major container, cruise, and ro-ro terminals. The shore-power mandate is governed separately from MHF 2022 No. 164 but feeds into energy consumption data: vessels using shore power report zero fuel consumption during berth time, and the China MSA data system records OPS (onshore power supply) use as a data point.

Mandatory shore-power use applies at certain major container terminals (including Yangshan, Yantian, Ningbo-Zhoushan, and Tianjin) and cruise terminals when the berth has OPS infrastructure installed and when berth time exceeds a threshold. The cold ironing and shore power guide covers the broader OPS regulatory framework. The cold ironing OPS offset calculator estimates per-visit emission reductions from OPS use.

Compliance workflow for operators calling Chinese ports

Before first China port call

1. Confirm the vessel is not exempt (military, fishing, or sports vessel).
2. Verify the SEEMP (Part I, II, and for Chinese-flagged vessels, Part III) is current and on board. Appoint a local port agent familiar with the China MSA portal.
3. Ensure energy consumption data from the previous voyage is compiled in the format required by JT/T 1340 and recorded in the logbook or relevant supporting document.
4. Verify fuel sulphur content is at or below 0.5% m/m on entry to the coastal DECA; arrange changeover if the vessel arrives on heavy fuel oil.

At each Chinese port

5. Submit the previous-voyage energy consumption data through the China MSA portal (via port agent if needed) as part of departure clearance.
6. Retain on board: BDNs, ROB records, engine logbook, oil record book, and SEEMP. Data retention minimum is two years.
7. If deficiency notices are issued by the PSC inspector regarding data submission or records, correct within three working days.

Annual cycle (Chinese-flagged vessels of 5,000 GT and above)

8. Compile annual fuel consumption data per JT/T 1340 and SEEMP Part II methodology.
9. Submit to CCS or an accredited verifier for Statement of Compliance.
10. File verified annual report with China MSA by 31 March.
11. Simultaneously, file the same data with the flag administration for IMO DCS purposes (or through CCS if CCS also acts as the IMO DCS verifier), and file the EU MRV emission report for any EU-calling voyages.

A single consistent dataset for all three regimes reduces the risk of inconsistencies that would flag during PSC inspection or THETIS-MRV audit.

Limitations

Several aspects of the China MSA regime involve genuine uncertainty that operators and practitioners should recognize:

The portal language barrier is a structural compliance risk. China MSA’s reporting portal has no English-language interface confirmed by multiple industry P&I sources. Foreign vessels that do not retain a Chinese-speaking local agent face a practical barrier to direct portal submission. Errors introduced by manual translation or agent re-entry are not covered by the regulation’s three-working-day correction window in the same way as deliberate misreporting, but they still constitute non-compliant records on China MSA’s system.

Penalty levels may change materially before 2027. The current CNY 2,000 fine level is widely acknowledged by industry (Gard, NorthStandard, UK P&I Club) as too low to act as a deterrent. The Marine Environmental Protection Law revision process was ongoing in 2024-2025 and could produce significantly higher penalties before the MHF 2022 No. 164 validity period expires in late 2027.

The 2025 DECA coastal 0.1% extension decision is unconfirmed in publicly accessible sources. The November 2018 implementation scheme committed to a feasibility study on extending the 0.1% sulphur limit from inland rivers and Hainan to all Chinese coastal DECA waters by 1 January 2025. As of 2026, no confirmed MOT announcement appears in publicly accessible English or Chinese regulatory sources confirming that extension has been formally adopted. The 0.5% m/m limit remains the confirmed limit for coastal DECA waters outside inland rivers and Hainan.

Shipping remains outside the China national ETS. Despite Shanghai’s voluntary carbon trading experiment and the broader growth of the China ETS to steel, cement, and aluminum, no formal inclusion of shipping in the national ETS had been announced as of mid-2026. Claims about a 2027-2030 maritime ETS pilot timeline circulating in some industry commentary are not attributable to confirmed MOT or MEE announcements.

China DCS data is not publicly accessible. Unlike the EU’s THETIS-MRV database, which publishes per-ship verified emission reports, China MSA treats its energy consumption database as an internal government resource. There is no equivalent of the IMO’s GISIS anonymized aggregate or the EU’s per-ship public record.

The IMO DCS and China MHF 2022 share the 31 March deadline but not the submission pathway. Operators sometimes assume that submitting the IMO DCS annual report satisfies China MSA’s annual report requirement for Chinese-flagged vessels. It does not: the two reports must be filed separately, to different bodies, even if the underlying data are identical.

See also

• IMO DCS vs EU MRV – the parallel global and EU reporting regimes
• EU MRV Regulation 2015/757 – the EU regional regime
• EU ETS for shipping – the EU cap-and-trade
• What is CII – operational carbon intensity indicator
• What is EEXI – existing-ship index
• What is EEDI – design-phase energy efficiency index
• SEEMP I, II and III – energy-efficiency management plan
• IMO Net-Zero Framework – the global GHG pricing mechanism
• IMO GHG Strategy – IMO policy framework
• MARPOL Annex VI – the global air-pollution and GHG framework
• MARPOL Convention – parent IMO treaty
• IMO 2020 sulphur cap – global sulphur cap
• Emission control areas – IMO ECA framework
• NOx Tier I, II and III – engine NOx certification regime
• Port state control – China MSA enforcement framework
• Classification society – CCS as primary China DCS verifier
• Exhaust gas cleaning system – scrubber technology in DECAs
• Selective catalytic reduction – Tier III NOx control
• Cold ironing and shore power guide – OPS at Chinese ports
• Slow steaming and CII – operational carbon intensity lever
• Heavy fuel oil – residual fuel subject to DECA limits
• Marine gas oil – distillate fuel for DECA compliance
• LNG as marine fuel – alternative compliant with DECA limits
• CARB At-Berth Regulation – parallel California shore-power regime
• CCS MRV China calculator – per-voyage fuel calculation for China MSA reporting
• IMO DCS annual report calculator – parallel global annual report
• MARPOL Annex VI/22A calculator – IMO DCS data collection plan
• MARPOL Annex VI/27 calculator – IMO DCS submission
• MARPOL Annex VI/28 CII calculator – operational CII rating
• CII attained calculator – attained CII calculation
• CII rating calculator – A-to-E rating
• EU MRV emissions calculator – per-voyage EU MRV emissions
• EU MRV to EU ETS crosswalk calculator – bridges MRV data to ETS surrender
• EU ETS cost calculator – EU ETS allowance cost
• SOx from fuel sulphur calculator – SOx mass-emission rate
• PM10 / PM2.5 calculator – particulate matter emission estimate
• NOx Tier II limit calculator – rated-speed-dependent Tier II
• NOx Tier III limit calculator – rated-speed-dependent Tier III
• NOx Tier compliance check calculator – integrated tier compliance check
• BDN reconciliation calculator – on-board fuel reconciliation
• FONAR calculator – fuel oil non-availability report
• MARPOL Annex VI/26 SEEMP calculator – SEEMP Part III structure