Colorado Revised Statutes Title 25. Health § 25-12-110. Off-highway vehicles

(a) If manufactured before January 1, 1998 99 db(A);

(b) If manufactured on or after January 1, 1998 96 db(A).

(a) If manufactured on or after July 1, 1972, and before July 2, 1975 90 db(A);

(b) If manufactured on or after July 2, 1975 88 db(A).

(3)(a) A person shall not sell or offer to sell a new off-highway vehicle that emits a level of sound in excess of that prohibited by subsection (1) of this section unless the off-highway vehicle complies with federal noise emission standards. A person shall not sell or offer to sell a new snowmobile that emits a level of sound in excess of that prohibited by subsection (2) of this section unless the snowmobile complies with federal noise emission standards.

(b) For the purposes of this section, a “new” snowmobile or off-highway vehicle means a snowmobile or off-highway vehicle that has not been transferred on a manufacturer's statement of origin and for which an ownership registration card has not been submitted by the original owner to the manufacturer.

(a) A vehicle designed or modified for and used in closed-circuit, off-highway vehicle competition facilities;

(b) An off-highway vehicle used in an emergency to search for or rescue a person; and

(c) An off-highway vehicle while in use for agricultural purposes.

(7)(a) Nothing in this section shall be construed to modify the authority granted in section 25-12-103.

(b) Nothing in this section shall be construed to authorize the test to produce a less restrictive standard than the J1287 stationary sound test or the J2567 stationary sound test published by SAE international or any successor organization.

(a) Was manufactured before January 1, 2005;

(b) Complied with federal and state law when purchased;

(c) Has not been modified from the manufacturer's original equipment specifications or to exceed the sound limits imposed by subsection (1) or (2) of this section; and

(d) Does not have a malfunctioning exhaust system.