RSA 270:37 Decibel Limits on Noise.

I. No person may operate, sell, or offer for sale any marine engine which is capable of being operated in a manner which exceeds the following noise levels measured under any testing procedure established pursuant to rules adopted under RSA 270:39:
(a) For a marine engine manufactured in or before 1990, a noise level of 90 decibels when subjected to stationary testing.
(b) For a marine engine manufactured after December 31, 1990, a noise level of 88 decibels when subjected to stationary testing.
(c) For a marine engine manufactured in or before 1990, a noise level of 84 decibels on the "A" scale, measured at 50 feet.
(d) For a marine engine manufactured after December 31, 1990, a noise level of 82 decibels on the "A" scale, measured at 50 feet.
II. The