Section 1045.101 - What exhaust emission standards and requirements must my engines meet?(a) You must show that your engines meet the following requirements:(1) Outboard and personal watercraft engines must meet the exhaust emission standards specified in § 1045.103 .(2) Sterndrive/inboard engines must meet the exhaust emission standards specified in § 1045.105 . You may optionally meet these standards earlier than we require, as specified in § 1045.145(b) .(3) Sterndrive/inboard engines must meet the engine-diagnostic requirements in § 1045.110 .(4) All engines must meet the requirements in § 1045.115 .(b) It is important that you read § 1045.145 to determine if there are other interim requirements or interim compliance provisions that apply for a limited time.