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Minn. Stat. § 84.871 Snowmobile noise limits <br />84.871 Mufflers <br />Except as provided in this section, every snowmobile shall be equipped at all times with a muffler in good <br />working order which blends the exhaust noise into the overall snowmobile noise and is in constant operation to <br />prevent excessive or unusual noise. The exhaust system shall not emit or produce a sharp popping or crackling <br />sound. This section does not apply to organized races or similar competitive events held on <br />A. private lands, with the permission of the owner, lessee, or custodian of the land; <br />B. public lands and water under the jurisdiction of the commissioner of natural resources, with the <br />commissioner's permission; or <br />C. other public lands, with the consent of the public agency owning the land. <br />No person shall have for sale, sell, or offer for sale on any new snow - mobile any muffler that fails to comply <br />with the specifications required by the rules of the commissioner after the effective date of the rules. <br />Minn. Rules § 6100.5700 Snowmobile noise limits <br />6100.5700 Required equipment <br />Subpart 5. Mufflers <br />Mufflers: <br />A. No person shall operate a snowmobile unless it is equipped with a muffler as required by law and <br />these rules, except that snowmobiles may be operated in organized events as authorized by Minnesota <br />Statutes, section 84.871, without such a muffler. <br />B. No snowmobile manufactured on or after June 30, 1970, and before February 1, 1972, for sale in <br />Minnesota, except snowmobiles designed for competition purposes only, shall be sold, or offered for <br />sale, unless it is equipped with a muffler that limits engine noise to not more than 86 decibels on the A <br />scale at 50 feet. <br />C. No snowmobile manufactured on or after February 1, 1972, for sale in Minnesota - except <br />snowmobiles designed for competition purposes only, shall be sold, or offered for sale, unless it is <br />equipped with a muffler that limits engine noise to not more than 82 decibels on the A scale at 50 feet. <br />D. No snowmobile manufactured on or after April 1, 1975, except a snowmobile designed for <br />competition purposes only, shall be sold, offered for sale, or operated in Minnesota unless it is so <br />equipped and has been certified by the manufacturer to conform to a sound level limitation of not <br />more than 78 decibels on the A scale at 50 feet as originally equipped. <br />E. In certifying that a new snowmobile complies with the noise limitation requirements of this rule, a <br />manufacturer shall make such a certification based on measurements made in accordance with the <br />SAE Recommended Practice J192 (a), as set forth in the Report of the Vehicle Sound Level <br />Committee, as approved by the Society of Automotive Engineers September 1970 and revised <br />November 1973. <br />F. No snowmobile shall be sold or offered for sale in Minnesota unless its maker has previously <br />furnished the commissioner with a certificate of compliance certifying that all snowmobiles made by <br />that maker meet or exceed the applicable noise level restrictions established by these rules. The <br />certification of compliance shall be in the form of a "Snowmobile Safety Certification Committee" <br />label conspicuously attached to the machine showing certification by the Snowmobile Safety and <br />Certification Committee, Inc., or a label showing compliance with Snowmobile Safety Certification <br />Committee standards accompanied by a letter containing test results of an evaluation of noise levels <br />by a competent independent testing laboratory. Snowmobiles intended for competition purposes only <br />shall be exempt from this part provided a separate placard identifying that such snowmobile is not so <br />equipped is conspicuously and permanently affixed thereto. <br />A Guide to Noise Control in <br />Minnesota • October 2008 Minnesota Pollution Control Agency <br />25 <br />