[Code of Federal Regulations] [Title 40, Volume 18] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR91.1] [Page 297] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 91--CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES--Table of Contents Subpart A--General Sec. 91.1 Applicability. (a) This part and all its subparts apply to marine spark-ignition engines used to propel marine vessels as defined in the General Provisions of the United States Code, 1 U.S.C.3 (1992), unless otherwise indicated. (b) Sterndrive and inboard engines are exempt from this part. (c) Existing technology OB/PWC are exempt from Sec. 91.112 and subparts D, E, F, G, I (Secs. 91.803 through 91.805), J, M and N through model year 2003.