; (B) built before July 1, 2013; and (C) 25 years of age or older. (2) An alternative safety compliance program prescribed under paragraph (1) shall apply to a vessel— (A) except as provided in subparagraph (B), after the later of January 1, 2020, or the end of the 3-year period beginning on the date on which the Secretary prescribes the program; and (B) in the case of a vessel that undergoes a major conversion completed after the later of July 1, 2013, or the date the Secretary establishes standards for the alternate safety compliance program, upon the completion of such conversion. . (b) Conforming amendment Section 4502(b) of title 46, United States Code, is amended by inserting and subject to section 4503(d), after In addition to the requirements of subsection (a) of this section, . 406. Authorization for marine debris program The Marine Debris Research, Prevention, and Reduction Act is amended— (1) in section 9 ( 33 U.S.C. 1958 )— (A) by striking the em-dash and all that follows through (1) ; and (B) by striking ; and and all that follows through the end of the section and inserting a period