Cal. Harb. & Nav. Code § 654.05
(a) The owner of a motorized recreational vessel that is numbered pursuant to Section 9850 of the Vehicle Code, or that is documented by an agency of the federal government, shall not operate, or authorize the operation of, the vessel in or upon the inland waters, or in or upon ocean waters that are within one mile of the coastline of the state, in a manner that exceeds the following noise levels: