§535.8. Reporting and recordkeeping requirements. — Inbound Citations
49 C.F.R. § 535.8
Statutory Authority
Cited by 18 regulations in release 2026-08-27.
Citations to 49 C.F.R. § 535.8 as a whole
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After receipt of each manufacturer's final report as specified in § 1036.730 and completion of any verification testing required to validate the manufacturer's submitted final data, we will issue a report to the Department of Transportation with CO2 emission information and will verify the accuracy of each manufacturer's equivalent fuel consumption data required by NHTSA under 49 CFR 535.8. We will send a report to DOT for each engine manufacturer based on each regulatory category and subcategory, including sufficient information for NHTSA to determine fuel consumption and associated credit values. See 49 CFR 535.8 to determine if NHTSA deems submission of this information to EPA to also be a submission to NHTSA.
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After receipt of each manufacturer's final report as specified in § 1037.730 and completion of any verification testing required to validate the manufacturer's submitted final data, we will issue a report to the Department of Transportation with CO2 emission information and will verify the accuracy of each manufacturer's equivalent fuel consumption data required by NHTSA under 49 CFR 535.8. We will send a report to DOT for each vehicle manufacturer based on each regulatory category and subcategory, including sufficient information for NHTSA to determine fuel consumption and associated credit values. See 49 CFR 535.8 to determine if NHTSA deems submission of this information to EPA to also be a submission to NHTSA.
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(7) Only certain vehicles and engines are allowed to comply differently between the NHTSA and EPA programs as detailed in this section. These vehicles and engines must be identified by manufacturers in the ABT and production reports required in § 535.8.
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(i) In cases where there are differences between the application of this part and the corresponding EPA program regarding whether a vehicle is regulated or not (such as due to differences in applicability resulting from differing agency definitions, etc.), manufacturers should contact the agencies to identify these vehicles and assess the applicability of the agencies' standards. The agencies will provide guidance on how the vehicles can comply. Manufacturers are required to identify these vehicles in their final reports submitted in accordance with § 535.8.
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(ii) For Phase 1, manufacturers must select an alternative for subconfiguration target standards at the same time they submit the model year 2016 pre-model year Report, specified in § 535.8. Once selected, the decision cannot be reversed and the manufacturer must continue to comply with the same alternative for subsequent model years.
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(i) If a manufacturer certifies an engine family for use both as a vocational engine and as a tractor engine, the manufacturer must split the family into two separate subfamilies in accordance with 40 CFR 1036.230. The manufacturer may assign the numbers and configurations of engines within the respective subfamilies at any time prior to the submission of the end-of-year report required by 40 CFR 1036.730 and § 535.8. The manufacturer must track into which type of vehicle each engine is installed, although EPA may allow the manufacturer to use statistical methods to determine this for a fraction of its engines.
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(1) Credits in this part mean a calculated weighted value representing the difference between the fuel consumption performance and the standard of a vehicle or engine family or fleet within a particular averaging set. Positive credits represent cases where a vehicle or engine family or fleets perform better than the applicable standard (the fuel consumption performance is less than the standard) whereas negative credits represent underperforming cases. The value of a credit is calculated according to paragraphs (b) through (e) of this section. FCCs are only considered earned or useable for averaging, banking or trading after EPA and NHTSA have verified the information in a manufacturer's final reports required in § 535.8. Types of FCCs include the following:(i) Credits generated by vehicle or engine families or fleets containing conventional vehicles (i.e., gasoline, diesel and alternative fueled vehicles).(ii) Credits generated by vehicle or engine families or fleets produced for model year 2013. Early credits are multiplied by an incentive factor of 1.5 times.(iii) Credits generated by vehicle or engine families or subconfigurations containing vehicles with advanced technologies (i.e., hybrids with regenerative braking, vehicles equipped with Rankine-cycle engines, electric and fuel cell vehicles) as described in paragraph (f)(1) of this section.(iv) Credits can be generated by vehicle or engine families or subconfigurations having fuel consumption reductions resulting from technologies not reflected in the GEM simulation tool or in the Federal Test Procedure (FTP) chassis dynamometer and that were not in common use with heavy-duty vehicles or engines before model year 2010 that are not reflected in the specified test procedure. Manufacturers should prove that these technologies were not in common use in heavy-duty vehicles or engines before model year 2010 by demonstrating factors such as the penetration rates of the technology in the market. NHTSA will not approve any request if it determines that these technologies do not qualify. The approach for determining innovative and off-cycle technology credits under this fuel consumption program is described in paragraph (f)(2) of this section and by the Environmental Protection Agency (EPA) under 40 CFR 86.1819-14(d)(13), 1036.610, and 1037.610. Starting in model year 2030, manufacturers certifying vehicles under § 535.5(a) may not earn off-cycle technology credits under 40 CFR 86.1819-14(d)(13).
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Citations to §535.8(b)
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(a) Manufacturers producing heavy-duty vehicles and engines applicable to fuel consumption standards in § 535.5, for each given model year, must submit the required information as specified in paragraphs (b) through (h) of this section.(1) The information required by this part must be submitted by the deadlines specified in this section and must be based upon all the information and data available to the manufacturer 30 days before submitting information.(2) Manufacturers must submit information electronically through the EPA database system as the single point of entry for all information required for this national program and both agencies will have access to the information. In special circumstances, data may not be able to be received electronically (i.e., during database system development work). The agencies will inform manufacturer of the alternatives can be used for submitting information. The format for the required information will be specified by EPA in coordination with NHTSA.(3) Manufacturers providing incomplete reports missing any of the required information or providing untimely reports are considered as not complying with standards (i.e., if good-faith estimates of U.S.-directed production volumes for EPA certificates of conformity are not provided) and are liable to pay civil penalties in accordance with 49 U.S.C. 32912.(4) Manufacturers certifying a vehicle or engine family using an FEL or FCL below the applicable fuel consumption standard as described in § 535.5 may choose not to generate fuel consumption credits for that family. In which case, the manufacturer is not required to submit reporting or keep the associated records described in this part for that family.(5) Manufacturers must use good engineering judgment and provide comparable fuel consumption information to that of the information or data provided to EPA under 40 CFR 86.1865, 1036.250, 1036.730, 1036.825 1037.250, 1037.730, and 1037.825.(6) Any information that must be sent directly to NHTSA. In instances in which EPA has not created an electronic pathway to receive the information, the information should be sent through an electronic portal identified by NHTSA or through the NHTSA CAFE database (i.e., information on fuel consumption credit transactions). If hardcopy documents must be sent, the information should be sent to the Associate Administrator of Enforcement at 1200 New Jersey Avenue SE, NVS-200, Office W45-306, Washington, DC 20590.
Citations to §535.8(c)
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(i) Each model year manufacturers submit credit plan in their certificates of conformity as required in 40 CFR 1036.725(b)(2) and 40 CFR 1037.725(b)(2). The plan is required to contain equivalent fuel consumption information in accordance § 535.8(c). The plan must include:(A) Detailed calculations of projected emission and fuel consumption credits (positive or negative) based on projected U.S.-directed production volumes. The agencies may require a manufacturer to include similar calculations from its other engine or vehicle families to project its net credit balances for the model year. If a manufacturer projects negative emission and/or fuel consumption credits for a family, it must state the source of positive emission and/or fuel consumption credits it expects to use to offset the negative credits demonstrating how it plans to resolve any credit deficits that might occur for a model year within a period of up to three model years after that deficit has occurred.
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(a) Manufacturers producing heavy-duty vehicles and engines applicable to fuel consumption standards in § 535.5, for each given model year, must submit the required information as specified in paragraphs (b) through (h) of this section.(1) The information required by this part must be submitted by the deadlines specified in this section and must be based upon all the information and data available to the manufacturer 30 days before submitting information.(2) Manufacturers must submit information electronically through the EPA database system as the single point of entry for all information required for this national program and both agencies will have access to the information. In special circumstances, data may not be able to be received electronically (i.e., during database system development work). The agencies will inform manufacturer of the alternatives can be used for submitting information. The format for the required information will be specified by EPA in coordination with NHTSA.(3) Manufacturers providing incomplete reports missing any of the required information or providing untimely reports are considered as not complying with standards (i.e., if good-faith estimates of U.S.-directed production volumes for EPA certificates of conformity are not provided) and are liable to pay civil penalties in accordance with 49 U.S.C. 32912.(4) Manufacturers certifying a vehicle or engine family using an FEL or FCL below the applicable fuel consumption standard as described in § 535.5 may choose not to generate fuel consumption credits for that family. In which case, the manufacturer is not required to submit reporting or keep the associated records described in this part for that family.(5) Manufacturers must use good engineering judgment and provide comparable fuel consumption information to that of the information or data provided to EPA under 40 CFR 86.1865, 1036.250, 1036.730, 1036.825 1037.250, 1037.730, and 1037.825.(6) Any information that must be sent directly to NHTSA. In instances in which EPA has not created an electronic pathway to receive the information, the information should be sent through an electronic portal identified by NHTSA or through the NHTSA CAFE database (i.e., information on fuel consumption credit transactions). If hardcopy documents must be sent, the information should be sent to the Associate Administrator of Enforcement at 1200 New Jersey Avenue SE, NVS-200, Office W45-306, Washington, DC 20590.
Citations to §535.8(d)
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(a) Manufacturers producing heavy-duty vehicles and engines applicable to fuel consumption standards in § 535.5, for each given model year, must submit the required information as specified in paragraphs (b) through (h) of this section.(1) The information required by this part must be submitted by the deadlines specified in this section and must be based upon all the information and data available to the manufacturer 30 days before submitting information.(2) Manufacturers must submit information electronically through the EPA database system as the single point of entry for all information required for this national program and both agencies will have access to the information. In special circumstances, data may not be able to be received electronically (i.e., during database system development work). The agencies will inform manufacturer of the alternatives can be used for submitting information. The format for the required information will be specified by EPA in coordination with NHTSA.(3) Manufacturers providing incomplete reports missing any of the required information or providing untimely reports are considered as not complying with standards (i.e., if good-faith estimates of U.S.-directed production volumes for EPA certificates of conformity are not provided) and are liable to pay civil penalties in accordance with 49 U.S.C. 32912.(4) Manufacturers certifying a vehicle or engine family using an FEL or FCL below the applicable fuel consumption standard as described in § 535.5 may choose not to generate fuel consumption credits for that family. In which case, the manufacturer is not required to submit reporting or keep the associated records described in this part for that family.(5) Manufacturers must use good engineering judgment and provide comparable fuel consumption information to that of the information or data provided to EPA under 40 CFR 86.1865, 1036.250, 1036.730, 1036.825 1037.250, 1037.730, and 1037.825.(6) Any information that must be sent directly to NHTSA. In instances in which EPA has not created an electronic pathway to receive the information, the information should be sent through an electronic portal identified by NHTSA or through the NHTSA CAFE database (i.e., information on fuel consumption credit transactions). If hardcopy documents must be sent, the information should be sent to the Associate Administrator of Enforcement at 1200 New Jersey Avenue SE, NVS-200, Office W45-306, Washington, DC 20590.
Citations to §535.8(e)
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(a) Manufacturers producing heavy-duty vehicles and engines applicable to fuel consumption standards in § 535.5, for each given model year, must submit the required information as specified in paragraphs (b) through (h) of this section.(1) The information required by this part must be submitted by the deadlines specified in this section and must be based upon all the information and data available to the manufacturer 30 days before submitting information.(2) Manufacturers must submit information electronically through the EPA database system as the single point of entry for all information required for this national program and both agencies will have access to the information. In special circumstances, data may not be able to be received electronically (i.e., during database system development work). The agencies will inform manufacturer of the alternatives can be used for submitting information. The format for the required information will be specified by EPA in coordination with NHTSA.(3) Manufacturers providing incomplete reports missing any of the required information or providing untimely reports are considered as not complying with standards (i.e., if good-faith estimates of U.S.-directed production volumes for EPA certificates of conformity are not provided) and are liable to pay civil penalties in accordance with 49 U.S.C. 32912.(4) Manufacturers certifying a vehicle or engine family using an FEL or FCL below the applicable fuel consumption standard as described in § 535.5 may choose not to generate fuel consumption credits for that family. In which case, the manufacturer is not required to submit reporting or keep the associated records described in this part for that family.(5) Manufacturers must use good engineering judgment and provide comparable fuel consumption information to that of the information or data provided to EPA under 40 CFR 86.1865, 1036.250, 1036.730, 1036.825 1037.250, 1037.730, and 1037.825.(6) Any information that must be sent directly to NHTSA. In instances in which EPA has not created an electronic pathway to receive the information, the information should be sent through an electronic portal identified by NHTSA or through the NHTSA CAFE database (i.e., information on fuel consumption credit transactions). If hardcopy documents must be sent, the information should be sent to the Associate Administrator of Enforcement at 1200 New Jersey Avenue SE, NVS-200, Office W45-306, Washington, DC 20590.
Citations to §535.8(f)
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(a) Manufacturers producing heavy-duty vehicles and engines applicable to fuel consumption standards in § 535.5, for each given model year, must submit the required information as specified in paragraphs (b) through (h) of this section.(1) The information required by this part must be submitted by the deadlines specified in this section and must be based upon all the information and data available to the manufacturer 30 days before submitting information.(2) Manufacturers must submit information electronically through the EPA database system as the single point of entry for all information required for this national program and both agencies will have access to the information. In special circumstances, data may not be able to be received electronically (i.e., during database system development work). The agencies will inform manufacturer of the alternatives can be used for submitting information. The format for the required information will be specified by EPA in coordination with NHTSA.(3) Manufacturers providing incomplete reports missing any of the required information or providing untimely reports are considered as not complying with standards (i.e., if good-faith estimates of U.S.-directed production volumes for EPA certificates of conformity are not provided) and are liable to pay civil penalties in accordance with 49 U.S.C. 32912.(4) Manufacturers certifying a vehicle or engine family using an FEL or FCL below the applicable fuel consumption standard as described in § 535.5 may choose not to generate fuel consumption credits for that family. In which case, the manufacturer is not required to submit reporting or keep the associated records described in this part for that family.(5) Manufacturers must use good engineering judgment and provide comparable fuel consumption information to that of the information or data provided to EPA under 40 CFR 86.1865, 1036.250, 1036.730, 1036.825 1037.250, 1037.730, and 1037.825.(6) Any information that must be sent directly to NHTSA. In instances in which EPA has not created an electronic pathway to receive the information, the information should be sent through an electronic portal identified by NHTSA or through the NHTSA CAFE database (i.e., information on fuel consumption credit transactions). If hardcopy documents must be sent, the information should be sent to the Associate Administrator of Enforcement at 1200 New Jersey Avenue SE, NVS-200, Office W45-306, Washington, DC 20590.
Citations to §535.8(g)
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(i) For Phase 1, small business manufacturers are exempted from the vehicle and engine standards of § 535.5 but must comply with the reporting requirements of § 535.8(g).
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(a) Manufacturers producing heavy-duty vehicles and engines applicable to fuel consumption standards in § 535.5, for each given model year, must submit the required information as specified in paragraphs (b) through (h) of this section.(1) The information required by this part must be submitted by the deadlines specified in this section and must be based upon all the information and data available to the manufacturer 30 days before submitting information.(2) Manufacturers must submit information electronically through the EPA database system as the single point of entry for all information required for this national program and both agencies will have access to the information. In special circumstances, data may not be able to be received electronically (i.e., during database system development work). The agencies will inform manufacturer of the alternatives can be used for submitting information. The format for the required information will be specified by EPA in coordination with NHTSA.(3) Manufacturers providing incomplete reports missing any of the required information or providing untimely reports are considered as not complying with standards (i.e., if good-faith estimates of U.S.-directed production volumes for EPA certificates of conformity are not provided) and are liable to pay civil penalties in accordance with 49 U.S.C. 32912.(4) Manufacturers certifying a vehicle or engine family using an FEL or FCL below the applicable fuel consumption standard as described in § 535.5 may choose not to generate fuel consumption credits for that family. In which case, the manufacturer is not required to submit reporting or keep the associated records described in this part for that family.(5) Manufacturers must use good engineering judgment and provide comparable fuel consumption information to that of the information or data provided to EPA under 40 CFR 86.1865, 1036.250, 1036.730, 1036.825 1037.250, 1037.730, and 1037.825.(6) Any information that must be sent directly to NHTSA. In instances in which EPA has not created an electronic pathway to receive the information, the information should be sent through an electronic portal identified by NHTSA or through the NHTSA CAFE database (i.e., information on fuel consumption credit transactions). If hardcopy documents must be sent, the information should be sent to the Associate Administrator of Enforcement at 1200 New Jersey Avenue SE, NVS-200, Office W45-306, Washington, DC 20590.
Citations to §535.8(g)(7)
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(C) Within 90 days after the end of each model year, manufacturers must send to EPA a report as specified in § 535.8(g)(7) and EPA will make the report available to NHTSA.
Citations to §535.8(h)
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(a) Manufacturers producing heavy-duty vehicles and engines applicable to fuel consumption standards in § 535.5, for each given model year, must submit the required information as specified in paragraphs (b) through (h) of this section.(1) The information required by this part must be submitted by the deadlines specified in this section and must be based upon all the information and data available to the manufacturer 30 days before submitting information.(2) Manufacturers must submit information electronically through the EPA database system as the single point of entry for all information required for this national program and both agencies will have access to the information. In special circumstances, data may not be able to be received electronically (i.e., during database system development work). The agencies will inform manufacturer of the alternatives can be used for submitting information. The format for the required information will be specified by EPA in coordination with NHTSA.(3) Manufacturers providing incomplete reports missing any of the required information or providing untimely reports are considered as not complying with standards (i.e., if good-faith estimates of U.S.-directed production volumes for EPA certificates of conformity are not provided) and are liable to pay civil penalties in accordance with 49 U.S.C. 32912.(4) Manufacturers certifying a vehicle or engine family using an FEL or FCL below the applicable fuel consumption standard as described in § 535.5 may choose not to generate fuel consumption credits for that family. In which case, the manufacturer is not required to submit reporting or keep the associated records described in this part for that family.(5) Manufacturers must use good engineering judgment and provide comparable fuel consumption information to that of the information or data provided to EPA under 40 CFR 86.1865, 1036.250, 1036.730, 1036.825 1037.250, 1037.730, and 1037.825.(6) Any information that must be sent directly to NHTSA. In instances in which EPA has not created an electronic pathway to receive the information, the information should be sent through an electronic portal identified by NHTSA or through the NHTSA CAFE database (i.e., information on fuel consumption credit transactions). If hardcopy documents must be sent, the information should be sent to the Associate Administrator of Enforcement at 1200 New Jersey Avenue SE, NVS-200, Office W45-306, Washington, DC 20590.