[Code of Federal Regulations] [Title 40, Volume 30] [Revised as of July 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR1051.5] [Page 599] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 1051_CONTROL OF EMISSIONS FROM RECREATIONAL ENGINES AND VEHICLES --Table of Contents Subpart A_Determining How to Follow This Part Sec. 1051.5 Which engines are excluded or exempted from this part's requirements? (a) You may exclude vehicles with compression-ignition engines. See 40 CFR part 89 for regulations that cover these engines. (b) See subpart G of this part and 40 CFR part 1068, subpart C, for exemptions of specific engines. (c) We may require you to label an engine or vehicle (or both) if this section excludes it and other requirements in this chapter do not apply. (d) Send the Designated Officer a written request with supporting documentation if you want us to determine whether this part covers or excludes certain vehicles. Excluding engines from this part's requirements does not affect other requirements that may apply to them.