1. (a) Deficit Generation. Starting with the 2024 model year, a manufacturer accrues deficits for each on-road vehicle produced and delivered for sale in California for the model year, except for vehicles counted towards compliance with 13 CCR section 1962.4 or vehicles specified in subsection 1963.1(a)(1). A vehicle is only eligible to generate deficits once.

   1. (1) 2026 Model Year California-Certified Engine Flexibility. A manufacturer does not accrue deficits for any on-road vehicles produced and delivered for sale in California that are powered by new 2026 model year California-certified heavy heavy-duty engines that are certified at or below an applicable oxides of nitrogen exhaust emission standard or family emission limit of 0.050 grams per brake horsepower-hour on the Federal Test Procedure cycle, as specified in 13 CCR section 1956.8(a)(2)(C)(1).

2. (b) Deficit Calculation. Deficits shall be calculated each model year. For each on-road vehicle, the deficit is calculated as the product of the model year percentage requirement from Table A-1, and the appropriate weight class modifier for each vehicle from Table A-2. Every model year, the deficits generated by each vehicle are summed for each vehicle group.

   Table A-1. ZEV Sales Percentage Schedule

   Model Year

   Class 2b-3 Group

   Class 4-8 Group

   Class 7-8 Tractors Group

   2024

   5%

   9%

   5%

   2025

   7%

   11%

   7%

   2026

   10%

   13%

   10%

   2027

   15%

   20%

   15%

   2028

   20%

   30%

   20%

   2029

   25%

   40%

   25%

   2030

   30%

   50%

   30%

   2031

   35%

   55%

   35%

   2032

   40%

   60%

   40%

   2033

   45%

   65%

   40%

   2034

   50%

   70%

   40%

   2035

   55%

   75%

   40%

   Table A-2. Weight Class Modifiers

   Vehicles in the Class 2b-3

   Class 4-5 Vehicles in the Class 4-8 Group

   Class 6-7 Vehicles in the Class 4-8 Group

   Class 8 Vehicles in the Class 4-8 Group

   Vehicles in the Class 7 and 8 Tractor Group

   Weight

   0.8

   1

   1.5

   2

   2.5

   Class

   Modifier

3. (c) Deficit Rounding. If the sum of deficits generated in a model year for a vehicle group is not equal to a whole number, the sum of deficits shall round up to the nearest tenth when the fractional part is equal to or greater than 0.05, and round down to the nearest tenth if less than 0.05.
4. (d) Deficit Accounting. Deficits generated from vehicles in the Class 7-8 tractor group must be accounted separate from other deficits.

Basic Requirement. Beginning with the applicable effective dates, a manufacturer must comply with the following requirements:

Note: Authority cited: Sections 38501, 38510, 38560, 38566, 39500, 39600, 39601, 39650, 39658, 39659, 39666, 39667, 43013, 43018, 43100, 43101, 43102 and 43104, Health and Safety Code. Reference: Sections 38501, 38505, 38510, 38560, 38580, 39000, 39003, 39650, 39655, 43000, 43000.5, 43013, 43016, 43018, 43100, 43101, 43102, 43104, 43105, 43106, 43205 and 43205.5, Health and Safety Code.

History

1. New section filed 3-15-2021; operative 3-15-2021 pursuant to Government Code section 11343.4(b)(3) (Register 2021, No. 12). Transmission deadline specified in Government Code section 11346.4(b) extended 60 calendar days pursuant to Executive Order N-40-20 and an additional 60 calendar days pursuant to Executive Order N-71-20.

2. Amendment of subsection (a), new subsection (a)(1) and amendment of subsection (b), Table A-1 filed 5-9-2025; operative 5-9-2025 pursuant to Government Code section 11343.4(b)(3) (Register 2025, No. 19).