StacksVerified U.S. regulatory reference

40 CFR §1048.630

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
We may grant you an exemption from the standards and requirements of this part for a new engine on the grounds that it is to be used solely for competition under the provisions of 40 CFR 1054.620. The requirements of this part do not apply to engines that we exempt for use solely for competition.