40 C.F.R. § 205.171-3 Test motorcycle sample selection.
Title 40 - Protection of Environment
A test motorcycle to be used for selective enforcement audit testing of exhaust systems must be a motorcycle of the subject class which has been assembled using the manufacturer's normal production process, in stock configuration including exhaust system, and sold or offered for sale in commerce.
Title 40: Protection of Environment
PART 205—TRANSPORTATION EQUIPMENT NOISE EMISSION CONTROLS
Subpart E—Motorcycle Exhaust Systems
§ 205.171-3 Test motorcycle sample selection.