(2)__A noise level of 75 decibels when subjected to an operational test measured with and without cutouts engaged and as prescribed by the commissioner.

B.__The following penalties apply to violations of this subsection.

(1)__A person who violates this subsection commits a civil violation for which a fine of not less than $300 nor more than $500 may be adjudged.

(2)__A person who violates this subsection after having been adjudicated as having committed 3 or more civil violations under this Part within the previous 5-year period commits a Class E crime.

C.__This subsection does not apply to motorboats that are operating in a regatta or race approved by the commissioner under section 13061.

11.__Operating motorboat without muffler.__A person may not operate a motorboat that is not equipped at all times with an effective and suitable muffling device on its engine or engines to effectively deaden or muffle the noise of the exhaust, except that motorboats that are operating in a regatta or race approved by the commissioner under section 13061 may use cutouts for these motorboats while on trial runs or competing in speed events, for a period not to exceed 48 hours immediately preceding or following such an authorized event.

A. The following penalties apply to violations of this subsection.

(1)__A person who violates this subsection commits a civil violation for which a fine of not less than $100 nor more than $500 may be adjudged.

(2)__A person who violates this subsection after having been adjudicated as having committed 3 or more civil violations under this Part within the previous 5-year period commits a Class E crime.

12.__Tampering with motorboat muffler system.__A person may not modify a motorboat muffler system in any way that results in an increase in the decibels of sound emitted by that motorboat.