Each boat must be marked in the manner prescribed in §§ 183.25 and 183.27 with the maximum persons capacity in whole numbers of persons and in pounds, the maximum weight capacity in pounds, determined under §§ 183.33 through 183.43 , and the maximum horsepower capacity determined under § 183.53 or the statement "This Boat Not Rated for Propulsion by a Motor".
33 C.F.R. §183.23