Section 163.003-25 - Marking(a) Each pilot ladder step manufactured under Coast Guard approval must be branded or otherwise permanently and legibly marked on the bottom with-(1) The name of the manufacturer;(2) The manufacturer's brand or model designation;(3) The lot number or date of manufacture; and(4) The Coast Guard approval number.(b) In addition to the markings required under paragraph (a) of this section each step sold as a replacement step must be branded or otherwise permanently and legibly marked with the words "REPLACEMENT STEP ONLY."CGD 74-140, 46 FR 63291, Dec. 31, 1981, as amended by CGD 79-032, 49 FR 25456, June 21, 1984