documented vessel has the meaning given the term in section 106 of title 46, United States Code. (3) The term Ready Reserve Force has the meaning given the term in chapter 571 of title 46, United States Code. (i) Sunset The Maritime Administrator shall disband the working group upon the submission of the report required under subsection (f). (j) Temporary reduction of lengths of certain periods of service For the 3-year period beginning on the date of enactment of this Act— (1) section 7307 of title 46, United States Code, shall be applied by substituting 18 months for 3 years