40 CFR § 60.4203
How long must my engines meet the emission standards if I am a manufacturer of stationary CI internal combustion engines?
June 9, 2020
Engines manufactured by stationary CI internal combustion engine manufacturers must meet the emission standards as required in §§60.4201 and 60.4202 during the certified emissions life of the engines.
[76 FR 37968, June 28, 2011]