40 CFR § 91.1013
Exemption for certified Small SI engines
June 9, 2020
The provisions of 40 CFR 1045.605 and 1045.610 apply for engines subject to the standards of this part 91. This generally allows manufacturers to use marine engines that have been certified to emission standards for nonroad spark-ignition engines below 19 kW without recertifying those engines under this part 91.
[73 FR 59183, Oct. 8, 2008]
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