Arizona Revised Statutes Title 5. Amusements and Sports § 5-336. Muffling devices

A. Every motor driven watercraft shall at all times be equipped with effective equipment, in good working order and in constant operation, to prevent excessive or unusual noise except as provided in subsection C.

B. It is not the intent of this section to prohibit the use of any type of exhaust system or exhaust device, including those systems and devices which do not discharge water with the exhaust gases, if such system or device complies with subsection A of this section.

C. All watercraft actually competing in a regatta, boat race or official trials for speed records, and within the time limits authorized by the sanctioning body of such event are exempt from this section. Permits designating place and time limits are required and shall be issued by the department prior to the testing of watercraft on the water when sufficient evidence is provided by the applicant that such watercraft is actually entered in an event sanctioned by a national or regional organization having jurisdiction over the event.