(a) You may certify tractors at or above 120,000 pounds GCWR to the following CO2 standards instead of the CO2 standards of §1037.106:
Table 1 of §1037.670—Optional CO2 Standards for Tractors Above 120,000 Pounds GCWR by Model Year
[g/ton-mile]
| Subcategory | Phase 2 standards for model years 2021 and later |
|---|---|
| Heavy Class 8 Low-Roof Day Cab | 51.8 |
| Heavy Class 8 Low-Roof Sleeper Cab | 45.3 |
| Heavy Class 8 Mid-Roof Day Cab | 54.1 |
| Heavy Class 8 Mid-Roof Sleeper Cab | 47.9 |
| Heavy Class 8 High-Roof Day Cab | 54.1 |
| Heavy Class 8 High-Roof Sleeper Cab | 46.9 |
(b) Determine subcategories as described in §1037.230 for tractors that are not heavy-haul tractors. For example, the subcategory for tractors that would otherwise be considered Class 8 low-roof day cabs would be Heavy Class 8 Low-Roof Day Cabs.
(c) Except for the CO2 standards of §1037.106, all provisions applicable to tractors under this part continue to apply to tractors certified to the standards of this section. Include the following compliance statement on your label instead of the statement specified in §1037.135(c)(8): “THIS VEHICLE COMPLIES WITH U.S. EPA REGULATIONS FOR [MODEL YEAR] HEAVY-DUTY VEHICLES UNDER 40 CFR 1037.670.”
(d) The optional emission standards in this section are intended primarily for tractors that will be exported; however, you may include any tractors certified under this section in your emission credit calculation under §1037.705 if they are part of your U.S.-directed production volume.
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