StacksVerified U.S. regulatory reference

40 CFR §1045.705

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The provisions of this section apply for calculating exhaust emission credits for HC + NOX or CO. You may generate exhaust emission credits only if you are a certifying engine manufacturer.
  1. (a)For each participating family, calculate positive or negative emission credits relative to the otherwise applicable emission standard. Calculate positive emission credits for a family that has an FEL below the standard. Calculate negative emission credits for a family that has an FEL above the standard. Sum your positive and negative credits for the model year before rounding. Round the sum of emission credits to the nearest kilogram (kg) using consistent units throughout the following equation:
  2. (b)[Reserved]