An all-terrain vehicle or snowmobile shall not be operated without suitable and effective muffling devices which limit engine noise to not more than eighty-six decibels as measured on the "A" scale at a distance of fifty feet; and a snowmobile, manufactured after July 1, 1973, which is sold, offered for sale, or used in this state, except in an authorized special event, shall have a muffler system that limits engine noise to not more than eighty-two decibels as measured on the "A" scale at a distance of fifty feet.
The commission may adopt rules with respect to the inspection of all-terrain vehicles and snowmobiles and testing of their mufflers.
A separate placard shall be affixed, permanently and conspicuously, to any new snowmobile sold or offered for sale in this state that does not meet the muffler requirements as stated above. The placard shall designate each snowmobile which does not meet the muffler requirements.
A snowmobile manufactured after July 1, 1975, which is sold, offered for sale or used in this state, except in an authorized special event, shall have a muffler system that limits engine noise to not more than seventy-eight decibels as measured on the "A" scale at a distance of fifty feet.
[C71, 73, 75, 77, 79, 81, § 321G.11]
89 Acts, ch 244, § 23
Referred to in § 805.8(4b)
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