; use requirement (a) In general Section 4312 of title 46, United States Code, is amended— (1) by redesignating subsections (b), (c), and (d) as subsections (c), (d), and (e), respectively; and (2) by inserting after subsection (a) the following: (b) Use requirement (1) In general An individual operating a covered recreational vessel shall use an engine cut-off switch link while operating on plane or above displacement speed. (2) Exceptions The requirement under paragraph (1) shall not apply if— (A) the main helm of the covered vessel is installed within an enclosed cabin; or (B) the vessel does not have an engine cut-off switch and is not required to have one under subsection (a). . (b) Civil penalty Section 4311 of title 46, United States Code, is amended by— (1) redesignating subsections (c), (d), (e), (f), and (g) as subsections (d), (e), (f), (g), and (h), respectively; and (2) inserting after subsection (b) the following: (c) A person violating section 4312(b) of this title is liable to the United States Government for a civil penalty of not more than— (1) $100 for the first offense; (2) $250 for the second offense; and (3) $500 for any subsequent offense. . (c) Effective date The amendments made in subsections (a) and (b) shall take effect 90 days after the date of the enactment of this section, unless the Commandant of the Coast Guard, prior to the date that is 90 days after the date of the enactment of this section, determines that the use requirement enacted in subsection (a) would not promote recreational boating safety. 314. Exemptions and equivalents (a) In general Section 4305 of title 46, United States Code, is amended— (1) by striking the heading and inserting the following: 4305. Exemptions and equivalents ; (2) by inserting (a) Exemptions.— before If the Secretary