N.D. Cent. Code § 20.1-13-07.1: Regulation of noise from boats - Penalty

1.A boat operated on the waters of this state between the hours of twelve midnight and five a.m. may not produce a noise in excess of eighty-eight decibels for more than ten minutes.

2.For purposes of subsection 1, the decibel level of a boat must be measured from the shoreline closest to the location from which a complainant or other individual noticed the noise.

3.A boat operator who violates this section is guilty of a class 1 noncriminal offense.

4.A boat operator cited for a violation of this section may not operate the boat that produced the noise in violation of this section until a muffler is installed.