Okla. Stat. tit. 63, § 63-4208: Noise control equipment and noise levels

A. No person shall operate upon the waters of this state any

vessel or motor which is not equipped with a muffler or muffler

system in good working order. The use of cutouts, removal of

mufflers or muffler baffles, cutting or punching of holes in

mufflers or otherwise modifying the original muffler or muffling

system installed by the manufacturer or any subsequent muffler or

muffling system so as to increase or modify the noise level is

prohibited. This section shall not apply to vessels in the act of

participating in a sanctioned event.

B. No person shall authorize, cause or permit unnecessary

sounding of any whistle, horn, bell, siren or other sound-producing

device on a vessel while such vessel is within any harbor limits or

in areas of congested vessel traffic.