Cal. Code Regs. tit. 17, § 95663 – Greenhouse Gas Exhaust Emission Standards and Test Procedures for New 2014 and Subsequent Model Heavy-Duty Vehicles.

(a) GHG Exhaust Emission Standards for New 2014 and Subsequent Model Heavy-Duty Vocational Vehicles and Tractors
1. (1) Diesel and Otto-Cycle Vocational Vehicles.
  1. (A) Phase 1 Emission Standards. The CO₂ emissions for new 2014 through 2020 model heavy-duty vocational vehicles shall not exceed:
    1. 1. Averaging, Banking, and Trading and Credits. The requirements for the optional averaging, banking, and trading program and for generating credits are described in the applicable test procedures incorporated by reference in section (d).
    2. 2. Useful Life Requirements. Heavy-duty vocational vehicles must comply with the emission standards in this subsection (a)(1)(A) throughout the full useful life, as follows:
      1. a. 110,000 miles or 10 years, whichever comes first, for vehicles at or below 19,500 pounds GVWR.
      2. b. 185,000 miles or 10 years, whichever comes first, for vehicles above 19,500 pounds GVWR and at or below 33,000 pounds GVWR.
      3. c. 435,000 miles or 10 years, whichever comes first, for vehicles above 33,000 pounds GVWR.
    Phase 1 CO₂ Emission Standards for 2014 Through 2020 Model Vocational Vehicles (g/ton-mile)
    GVWR (pounds)
    Model Years 2014 - 2016
    Model Years 2017 - 2020
    8,500 < GVWR ≤ 19,500
    388
    373
    19,500 < GVWR ≤ 33,500
    234
    225
    GVWR > 33,000
    226
    222
  2. (B) Phase 2 Emission Standards. The CO₂ emissions for new 2021 and subsequent model heavy-duty vocational vehicles shall not exceed the following emission standards. Standards differ based on engine cycle, vehicle size, and intended vehicle duty cycle.
    1. 1. Phase 2 CO₂ standards for 2021 through 2023 model vocational vehicles:
      Phase 2 CO₂ Emission Standards for 2021 Through 2023 Model Vocational Vehicles
      (g/ton-mile)
      Engine Cycle
      GVWR (pounds)
      Vehicle Size
      Multi-Purpose Duty Cycle
      Regional Duty Cycle
      Urban Duty Cycle
      Diesel
      8,500 < GVWR ≤ 19,500
      Light HDV
      373
      311
      424
      Diesel ¹
      19,500 < GVWR
      Medium HDV
      265
      234
      296
      Diesel ²
      19,500 < GVWR
      Heavy HDV
      261
      205
      308
      Otto-Cycle
      8,500 < GVWR ≤ 19,500
      Light HDV
      407
      335
      461
      Otto-Cycle
      19,500 < GVWR
      Medium HDV
      293
      261
      328
      1 Vocational vehicles with installed light or medium heavy-duty engines.
      2 Vocational vehicles with installed heavy heavy-duty engines.
    2. 2. Phase 2 CO₂ standards for 2024 through 2026 model vocational vehicles:
      Phase 2 CO₂ Emission Standards for 2024 Through 2026 Model Vocational Vehicles
      (g/ton-mile)
      Engine Cycle
      GVWR (pounds)
      Vehicle Size
      Multi-Purpose Duty Cycle
      Regional Duty Cycle
      Urban Duty Cycle
      Diesel
      8,500 < GVWR ≤ 19,500
      Light HDV
      344
      296
      385
      Diesel ¹
      19,500 < GVWR
      Medium HDV
      246
      221
      271
      Diesel ²
      19,500 < GVWR
      Heavy HDV
      242
      194
      283
      Otto-Cycle
      8,500 < GVWR ≤ 19,500
      Light HDV
      385
      324
      432
      Otto-Cycle
      19,500 < GVWR
      Medium HDV
      279
      251
      310
      1 Vocational vehicles with installed light or medium heavy-duty engines.
      2 Vocational vehicles with installed heavy heavy-duty engines.
    3. 3. Phase 2 CO₂ standards for 2027 and subsequent model vocational vehicles:
      Phase 2 CO₂ Emission Standards for 2027 and Subsequent Model Vocational Vehicles
      (g/ton-mile)
      Engine Cycle
      GVWR (pounds)
      Vehicle Size
      Multi-Purpose Duty Cycle
      Regional Duty Cycle
      Urban Duty Cycle
      Diesel
      8,500 < GVWR ≤ 19,500
      Light HDV
      330
      291
      367
      Diesel ¹
      19,500 < GVWR
      Medium HDV
      235
      218
      258
      Diesel ²
      19,500 < GVWR
      Heavy HDV
      230
      189
      269
      Otto-Cycle
      8,500 < GVWR ≤ 19,500
      Light HDV
      372
      319
      413
      Otto-Cycle
      19,500 < GVWR
      Medium HDV
      268
      247
      297
      1 Vocational vehicles with installed light or medium heavy-duty engines.
      2 Vocational vehicles with installed heavy heavy-duty engines.
    4. 4. Optional Phase 2 custom chassis CO₂ standards for qualifying 2021 and subsequent model vocational vehicles:
      Optional Phase 2 Custom Chassis CO₂ Emission Standards for 2021 and Subsequent Model Vocational Vehicles
      (g/ton-mile)
      Vehicle Type ¹
      Assigned Vehicle Service Class
      Model Year 2021-2026
      Model Year 2027 and Later
      School bus
      Medium HDV
      291
      271
      Motor home
      Medium HDV
      228
      226
      Coach bus
      Heavy HDV
      210
      205
      Other bus ²
      Heavy HDV
      300
      286
      Refuse hauler
      Heavy HDV
      313
      298
      Concrete mixer
      Heavy HDV
      319
      316
      Mixed-use vehicle
      Heavy HDV
      319
      316
      Emergency vehicle
      Heavy HDV
      324
      319
      1 Vehicle types are generally defined in the applicable test procedures incorporated by reference in section (d).
      2 Additional requirements apply if the Other bus standard is used to certify a GHG urban bus, as described in the applicable test procedures incorporated by reference in section (d).
    5. 5. Averaging, Banking, and Trading and Credits. The requirements for the optional averaging, banking, and trading program and for generating credits are described in the applicable test procedures incorporated by reference in section (d) of this section, including additional requirements for the optional custom chassis other bus emission standard.
    6. 6. Useful Life Requirements. Vocational vehicles must comply with the emission standards in this subsection (a)(1)(B)1. through (a)(1)(B)4. throughout the full useful life, as follows:
      1. a. 150,000 miles or 15 years, whichever comes first, for Light HDV.
      2. b. 185,000 miles or 10 years, whichever comes first, for Medium HDV.
      3. c. 435,000 miles or 10 years, whichever comes first, for Heavy HDV.
    7. 7. Air Conditioning Leakage. Loss of refrigerant from air conditioning systems from 2021 and subsequent model vocational vehicles may not exceed a total leakage rate of 11.0 grams per year or a percent leakage rate of 1.50 percent per year, whichever is greater. This applies for all refrigerants.
2. (2) Diesel and Otto-Cycle Tractors above 26,000 Pounds GVWR.
  1. (A) Phase 1 Emission Standards. The CO₂ emissions for new 2014 through 2020 model tractors above 26,000 pounds GVWR shall not exceed:
    1. 1. Averaging, Banking, and Trading Program and Credits. The requirements for the optional averaging, banking, and trading program and for generating credits are described in the applicable test procedures incorporated by reference in section (d).
    2. 2. Useful Life Requirements. Heavy-duty tractors must comply with the emission standards in this subsection (a)(2)(A) throughout the full useful life, as follows:
      1. a. 185,000 miles or 10 years, whichever comes first, for vehicles above 26,000 pounds GVWR and at or below 33,000 pounds GVWR.
      2. b. 435,000 miles or 10 years, whichever comes first, for vehicles above 33,000 pounds GVWR.
    3. 3. Air Conditioning Leakage. Loss of refrigerant from air conditioning systems from 2014 through 2020 heavy-duty tractors may not exceed 1.50 percent per year, except as allowed by subsections (a)(2)(A)3.a. and (a)(2)(A)3.b. below.
      1. a. For air conditioning refrigerants other than HFC-134a, the leakage rate is adjusted by multiplying it by the global warming potential of the refrigerant and dividing the product by 1430 (which is the global warming potential of HFC-134a).
      2. b. If the total refrigerant capacity is less than 734 grams, the leakage rate may exceed 1.50 percent, as long as the total leakage rate does not exceed 11.0 grams per year.
    Phase 1 CO₂ Emission Standards for 2014 Through 2020 Model Tractors (g/ton-mile)
    GVWR (pounds)
    Sub-Category
    Model Years 2014 - 2016
    Model Years 2017 - 2020
    26,000 < GVWR ≤ 33,000
    Low-Roof (all cab styles)
    107
    104
    Mid-Roof (all cab styles)
    119
    115
    High-Roof (all cab styles)
    124
    120
    GVWR > 33,000
    Low-Roof Day Cab
    81
    80
    Low-Roof Sleeper Cab
    68
    66
    Mid-Roof Day Cab
    88
    86
    Mid-Roof Sleeper Cab
    76
    73
    High-Roof Day Cab
    92
    89
    High-Roof Sleeper Cab
    75
    72
  2. (B) Phase 2 Emission Standards. The CO₂ emissions for new 2021 and subsequent model tractors above 26,000 pounds GVWR shall not exceed:
    1. 1. Averaging, Banking, and Trading Program and Credits. The requirements for the optional averaging, banking, and trading program and for generating credits are described in the applicable test procedures incorporated by reference in section (d).
    2. 2. Useful Life Requirements. Heavy-duty tractors must comply with the emission standards in this subsection (a)(2)(B) throughout the full useful life, as follows:
      1. a. 185,000 miles or 10 years, whichever comes first, for vehicles above 26,000 pounds GVWR and at or below 33,000 pounds GVWR.
      2. b. 435,000 miles or 10 years, whichever comes first, for vehicles above 33,000 pounds GVWR.
    3. 3. Air Conditioning Leakage. Loss of refrigerant from air conditioning systems from 2021 and subsequent heavy-duty tractors may not exceed a total leakage rate of 11.0 grams per year or a percent leakage rate of 1.50 percent per year, whichever is greater. This applies for all refrigerants.
    Phase 2 CO₂ Emission Standards for 2021 and Subsequent Model Tractors
    (g/ton-mile)
    GVWR (pounds)
    Sub-Category ¹
    Model Years 2021 - 2023
    Model Years 2024 - 2026
    Model Year 2027 and later
    26,000 < GVWR ≤ 33,000
    Low-Roof (all cab styles)
    105.5
    99.8
    96.2
    26,000 < GVWR ≤ 33,000
    Mid-Roof (all cab styles)
    113.2
    107.1
    103.4
    26,000 < GVWR ≤ 33,000
    High-Roof (all cab styles)
    113.5
    106.6
    100.0
    GVWR > 33,000
    Low-Roof Day Cab
    80.5
    76.2
    73.4
    GVWR > 33,000
    Low-Roof Sleeper Cab
    72.3
    68.0
    64.1
    GVWR > 33,000
    Mid-Roof Day Cab
    85.4
    80.9
    78.0
    GVWR > 33,000
    Mid-Roof Sleeper Cab
    78.0
    73.5
    69.6
    GVWR > 33,000
    High-Roof Day Cab
    85.6
    80.4
    75.7
    GVWR > 33,000
    High-Roof Sleeper Cab
    75.7
    70.7
    64.3
    GVWR > 33,000
    Heavy-Haul Tractors
    52.4
    50.2
    48.3
    1 Sub-category terms are defined in the applicable test procedures incorporated by reference in section (d).
(b) GHG Exhaust Emission Standards for New 2014 and Subsequent Model Diesel and Otto-Cycle Medium-Duty Vehicles between 8,501 to 14,000 Pounds GVWR
1. (1) Diesel and Otto-Cycle Vehicles between 8,501 to 14,000 Pounds GVWR, excluding medium-duty passenger vehicles.
  1. (A) Diesel Vehicle Emission Standards.
    1. 1. CO₂ Fleet-Average Standards. For each model year, a manufacturer's national fleet-average CO₂ emissions for its diesel medium-duty vehicles shall not exceed the CO₂ fleet-average standard. The CO₂ fleet-average standard is calculated from the target value for each vehicle subconfiguration (Target_i) and U.S.-directed production volume of each vehicle subconfiguration for the given model year (Volume_i), as follows:
      1. a. Phase-In Provisions and Applicable Target Values.
      Fleet Average Standard
      =
      Σ[Target_i x Volume_i]
      Σ[Volume_i]
      Round the fleet-average standard to the nearest 0.1 g/mile. The target values, for each vehicle configuration, are calculated as follows:
      CO₂ Target (g/mile) = 0.0416 x WF + 320
      where WF is the work factor.
      WF = 0.75 x (GVWR - Curb Weight + xwd) + 0.25 x (GCWR - GVWR)
      Where:
      xwd = 500 pounds if the vehicle has four-wheel drive or all-wheel drive; xwd = 0 pounds for all other vehicles.
i. For 2014 through 2020 model new vehicles, a manufacturer must choose either Phase 1 Option A or Option B below for phasing in the diesel fleet-average CO₂ target of this subsection (b)(1)(A).
Phase 1 Option A Phase-In Provisions for Diesel Fleet-Average CO₂ Target
Vehicle model year
Option A CO₂ target (g/mile)
2014
[0.0478 x (WF)] + 368
2015
[0.0474 x (WF)] + 366
2016
[0.0460 x (WF)] + 354
2017
[0.0445 x (WF)] + 343
2018-2020
[0.0416 x (WF)] + 320
Phase 1 Option B Phase-In Provisions for Diesel Fleet-Average CO₂ Target
Vehicle model year
Option B CO₂ target (g/mile)
2014
[0.0478 x (WF)] + 368
2015
[0.0474 x (WF)] + 366
2016-2018
[0.0440 x (WF)] + 339
2019-2020
[0.0416 x (WF)] + 320
ii. For 2021 and later model new vehicles, a manufacturer must comply with the following Phase 2 CO₂ target values for its applicable diesel vehicle fleet:
1. b. Useful Life Provisions. A medium-duty vehicle must comply with the emission standards in this subsection (b)(1)(A) throughout its full useful life, of 11 years or 120,000 miles, whichever occurs first, for 2014 through 2020 model year vehicles (Phase 1), and of 15 years or 150,000 miles for 2021 and later model year vehicles (Phase 2).
2. c. Production and In-use CO₂ standards. Each vehicle a manufacturer produces that is subject to the standards of this section has an “in-use” CO₂ standard that is calculated from the test result and that applies for selective enforcement audits and in-use testing. This in-use CO₂ standard for each vehicle is equal to the applicable deteriorated emission level multiplied by 1.10 and rounded to the nearest 0.1 g/mile for Phase 1 vehicles and nearest whole g/mile for Phase 2 vehicles.
3. 2. N₂O and CH₄ Emission Standards. The N₂O emissions for new 2014 and subsequent model medium-duty vehicles shall not exceed 0.05 g/mi, and CH₄ emissions for new 2014 and subsequent model medium-duty vehicles shall not exceed 0.05 g/mi. Alternate standards using CO₂ emission credits may be used and are described in the “California Green-house Gas Exhaust Emission Standards and Test Procedures for 2014 and Subsequent Model Heavy-Duty Vehicles,” incorporated by reference in section (d).
4. (B) Otto-Cycle Vehicle Emission Standards.
  1. 1. CO₂ Fleet-Average Standards. For each model year, a manufacturer's national fleet-average CO₂ emissions for its Otto-cycle medium-duty vehicles shall not exceed the CO₂ fleet-average standard. The CO₂ fleet-average standard is calculated from the target value for each vehicle subconfiguration (Target_i) and U.S.-directed production volume of each vehicle subconfiguration for the given model year (Volume_i), as follows:
    1. a. Phase-In Provisions and Applicable Target Values.
    Fleet Average Standard
    =
    Σ[Target_i x Volume_i]
    Σ[Volume_i]
    Round the fleet-average standard to the nearest 0.1 g/mile. The target values, for each vehicle configuration, are calculated as follows:
    CO₂ Target (g/mile) = 0.0440 x WF + 339
    where WF is the work factor.
    WF = 0.75 x (GVWR - Curb Weight + xwd) + 0.25 x (GCWR - GVWR)
    Where:
    xwd = 500 pounds if the vehicle has four-wheel drive or all-wheel drive; xwd = 0 pounds for all other vehicles.
Vehicle Model Year
Phase 2 Diesel Fleet-Average CO₂ Target (g/mile)
2021
0.0406 x (WF) + 312
2022
0.0395 x (WF) + 304
2023
0.0386 x (WF) + 297
2024
0.0376 x (WF) + 289
2025
0.0367 x (WF) + 282
2026
0.0357 x (WF) + 275
2027 and later
0.0348 x (WF) + 268
i. For 2014 through 2020 model new vehicles, a manufacturer must choose either Phase 1 Option A or Option B below for phasing in the Otto-cycle fleet-average CO₂ target of this subsection (b)(1)(B).
Phase 1 Option A Phase-In Provisions for Otto-Cycle Fleet-Average CO₂ Target
Vehicle model year
Option A CO₂ target (g/mile)
2014
[0.0482 x (WF)] + 371
2015
[0.0479 x (WF)] + 369
2016
[0.0469 x (WF)] + 362
2017
[0.0460 x (WF)] + 354
2018-2020
[0.0440 x (WF)] + 339
Phase 1 Option B Phase-In Provisions for Otto-Cycle Fleet-Average CO₂ Target
Vehicle model year
Option B CO₂ target (g/mile)
2014
[0.0482 x (WF)] + 371
2015
[0.0479 x (WF)] + 369
2016-2018
[0.0456 x (WF)] + 352
2019-2020
[0.0440 x (WF)] + 339
ii. For 2021 and later model new vehicles, a manufacturer must comply with the following Phase 2 CO₂ target values for its applicable Otto-Cycle vehicle fleet:
1. b. Useful Life Provisions. A medium-duty vehicle must comply with the emission standards in this subsection (b)(1)(B) throughout its full useful life, which is 11 years or 120,000 miles, whichever occurs first, for 2014 through 2020 model year vehicles (Phase 1), and of 15 years or 150,000 miles for 2021 and later model year vehicles (Phase 2).
2. c. Production and In-use CO₂ standards. Each vehicle a manufacturer produces that is subject to the standards of this section has an “in-use” CO₂ standard that is calculated from the test result and that applies for selective enforcement audits and in-use testing. This in-use CO₂ standard for each vehicle is equal to the applicable deteriorated emission level multiplied by 1.10 and rounded to the nearest 0.1 g/mile for Phase 1 vehicles and nearest whole g/mile for Phase 2 vehicles.
3. 2. N₂O and CH₄ Emission Standards. The N₂O emissions for new 2014 and subsequent model medium-duty vehicles shall not exceed 0.05 g/mi, and CH₄ emissions for new 2014 and subsequent model medium-duty vehicles shall not exceed 0.05 g/mi. Alternate standards using CO₂ emission credits may be used and are described in the applicable test procedures incorporated by reference in section (d).
4. (C) Air Conditioning Leakage.
  1. 1. For 2014 to 2020 model Phase 1 vehicles, loss of refrigerant from air conditioning systems from 2014 and later medium-duty vehicles may not exceed 1.50 percent per year, except as allowed by subsections (b)(1)(C)(1)a. and (b)(1)(C)(1)b. below.
    1. a. For air condition refrigerants other than HFC-134a, the leakage rate is adjusted by multiplying it by the global warming potential of the refrigerant and dividing the product by 1430 (which is the global warming potential of HFC-134a).
    2. b. If the total refrigerant capacity is less than 734 grams, the leakage rate may exceed 1.50 percent, as long as the total leakage rate does not exceed 11.0 grams per year.
  2. 2. For 2021 and later model Phase 2 vehicles, loss of refrigerant from air conditioning systems may not exceed a total leakage rate of 11.0 grams per year or a percent leakage rate of 1.50 percent per year, whichever is greater. This applies for all refrigerants.
5. (c) GHG Exhaust Emission Standards for New 2020 and Subsequent Model Trailers
  1. (1) Phase 2 Emission Standards for Trailers. The exhaust emission standards specified in this subsection apply to trailers based on the effect of trailer designs on the performance of the trailer in conjunction with a tractor; this accounts for the effect of the trailer on the tractor's exhaust emissions, even though trailers themselves have no exhaust emissions.
    1. (A) Exclusions. This subsection does not apply to the following trailers:
      1. 1. Non-box trailers other than flatbed trailers, tank trailers, and container chassis.
      2. 2. Trailers meeting one or more of the following characteristics:
        a. Trailers with four or more axles and trailers less than 35 feet long with three axles (i.e., trailers intended for hauling very heavy loads).
        b. Trailers intended for temporary or permanent residence, office space, or other work space, such as campers, mobile homes, and carnival trailers.
        c. Trailers with a gap of at least 120 inches between adjacent axle centerlines. In the case of adjustable axle spacing, this refers to the closest possible axle positioning.
        d. Trailers built before January 1, 2020.
        e. Note that the definition of “trailer” in 40 CFR § 1037.801, as amended October 25, 2016, excludes equipment that serves similar purposes but are not intended to be pulled by a tractor. This exclusion applies to such equipment whether or not they are known commercially as trailers. For example, any equipment pulled by a heavy-duty vehicle with a pintle hook or hitch instead of a fifth wheel does not qualify as a trailer under this part.
    2. (B) CO₂ Emission Standards.
      1. 1. Definitions of Box Van Types. Different levels of stringency apply for box vans depending on features that may affect aerodynamic performance. A manufacturer may optionally meet less stringent standards for different trailer types, which are characterized as follows:
        a. For trailers 35 feet or longer, a manufacturer may designate as “non-aero box vans” those box vans that have a rear lift gate or rear hinged ramp, and at least one of the following side features: side lift gate, side-mounted pull-out platform, steps for side-door access, a drop-deck design, or belly boxes that occupy at least half the length of both sides of the trailer between the centerline of the landing gear and the leading edge of the front wheels. For trailers less than 35 feet long, a manufacturer may designate as “non-aero box vans” any refrigerated box vans with at least one of the side features identified for longer trailers.
        b. A manufacturer may designate as “partial-aero box vans” those box vans that have at least one of the side features identified in subsection (c)(1)(B)1.a. Long box vans may also qualify as partial-aero box vans if they have a rear lift gate or rear hinged ramp. Note that this subsection (c)(1)(B)1.b. does not apply for box vans designated as “non-aero box vans” under subsection (c)(1)(B)1.a.
        c. “Full-aero box vans” are box vans that are not designated as non-aero box vans or partial-aero box vans under this subsection (c)(1)(B)1.
      2. 2. CO₂ Emission Standards.
        a. Full-Aero Box Vans. CO₂ standards apply for full-aero box vans as specified in the following table:
        Phase 2 CO₂ Emission Standards for Full-Aero Box Vans (g/ton-mile)
        Model Year
        Dry Van
        Refrigerated Van
        Short
        Long
        Short
        Long
        2020
        125.4
        81.3
        129.1
        83.0
        2021-2023
        123.7
        78.9
        127.5
        80.6
        2024-2026
        120.9
        77.2
        124.7
        78.9
        2027+
        118.8
        75.7
        122.7
        77.4
        b. Partial-Aero Box Vans. CO₂ standards apply for partial-aero box vans as specified in the following table:
        Phase 2 CO₂ Emission Standards for Partial-Aero Box Vans (g/ton-mile)
        Model Year
        Dry Van
        Refrigerated Van
        Short
        Long
        Short
        Long
        2020
        125.4
        81.3
        129.1
        83.0
        2021+
        123.7
        80.6
        127.5
        82.3
        c. Non-Box Trailers and Non-Aero Box Vans. Non-box trailers and non-aero box vans must meet standards as follows:
Vehicle Model Year
Phase 2 Otto-Cycle Fleet-Average CO₂ Target (g/mile)
2021
0.0429 x (WF) + 331
2022
0.0418 x (WF) + 322
2023
0.0408 x (WF) + 314
2024
0.0398 x (WF) + 306
2025
0.0388 x (WF) + 299
2026
0.0378 x (WF) + 291
2027 and later
0.0369 x (WF) + 284
i. Trailers must use automatic tire inflation systems or tire pressure monitoring systems with wheels on all axles.
ii. Non-box trailers must use tires with a tire rolling resistance level at or below 5.1 kg/tonne. Model year 2020 non-box trailers may instead use tires with a tire rolling resistance level at or below 6.0 kg/tonne.
iii. Non-aero box vans must use tires with a tire rolling resistance level at or below 4.7 kg/tonne. Model year 2020 non-aero box vans may instead use tires with a tire rolling resistance level at or below 5.1 kg/tonne.
1. d. Averaging, Banking, and Trading Program. The requirements for the optional averaging program, which begins in model year 2027, are described in the applicable test procedures incorporated by reference in section (d). A manufacturer may not use averaging for non-box trailers, partial-aero box vans, or non-aero box vans that meet standards under subsection (c)(1)(B)2.b. or (c)(1)(b)2.c. of this section, and a manufacturer may not use emission credits for banking or trading for any trailers.
2. e. Useful Life Requirements. A trailer must comply with the applicable emission standard in this subsection throughout the useful life of 10 years.
3. (C) Other GHG Emission Standards. No CH₄, N₂O, or HFC standards apply under this subsection.
4. (d) The test procedures for determining compliance with GHG emission standards applicable to 2014 and subsequent model medium- and heavy-duty vehicles are set forth in the “California Greenhouse Gas Exhaust Emission Standards and Test Procedures for 2014 and Subsequent Model Heavy-Duty Vehicles,” adopted October 21, 2014, as last amended September 9, 2021, which is incorporated by reference herein.

Unless and until a court of competent jurisdiction issues a final ruling that H.J. Res. 88 (119th Congress) and H.J. Res. 89 (119th Congress) are invalid or that the waivers U.S. EPA granted California on January 6, 2025, 90 Federal Register 642 and 90 Federal Register 643, are in effect, regulated parties may choose to follow either this section 95663 or section 95663.0.1.

However, if a court of competent jurisdiction issues a final ruling that H.J. Res. 88 (119th Congress) and H.J. Res. 89 (119th Congress) are invalid or that the waivers U.S. EPA granted California on January 61 2025, 90 Federal Register 642 and 90 Federal Register 643, are in effect, the regulated parties are subject to the requirements of this section 95663 to the extent consistent with the court's final ruling . Notice of the court's ruling will be posted on CARB's website, https://arb.ca.gov.

Note: Authority cited: Sections 38501, 38505, 38510, 38560, 39010, 39600, 39601, 43013, 43018, 43101, 43104 and 43105, Health and Safety Code. Reference: Sections 38501, 38505, 38510, 38560, 38580, 39002, 39003, 39600, 39601, 43000, 43009.5, 43013, 43018, 43100, 43101, 43101.5, 43102, 43104, 43105, 43106, 43205, 43205.5 and 43211, Health and Safety Code.

History

1. New section filed 12-5-2014; operative 12-5-2014 pursuant to Government Code section 11343.4(b)(3) (Register 2014, No. 49).

2. Editorial correction of History 1 (Register 2014, No. 50).

3. Amendment filed 2-7-2019; operative 4-1-2019 (Register 2019, No. 6).

4. Amendment of subsection (d) filed 1-21-2020; operative 4-1-2020 (Register 2020, No. 4).

5. Amendment of subsections (a)(2)(B) and (d) filed 12-22-2021; operative 12-22-2021 (Register 2021, No. 52). Transmission deadline specified in Government Code section 11346.4(b) extended 60 calendar days pursuant to Executive Order N-40-20. Filing deadline specified in Government Code section 11349.3(a) extended 60 calendar days pursuant to Executive Order N-40-20 and an additional 60 calendar days pursuant to Executive Order N-71-20.

6. New first and second paragraphs filed 10-2-2025 as an emergency; operative 10-2-2025 (Register 2025, No. 40). A Certificate of Compliance must be transmitted to OAL by 4-1-2026 or emergency language will be repealed by operation of law on the following day.

7. New first and second paragraphs refiled 3-26-2026 as an emergency; operative 4-1-2026 (Register 2026, No. 13). A Certificate of Compliance must be transmitted to OAL by 6-30-2026 or emergency language will be repealed by operation of law on the following day.