The Under Secretary may prescribe regulations relating to shore leave for professional mariners without regard to the requirements of section 6305 of title 5.
The regulations prescribed under subsection (a) shall-
In this section, the term "professional mariner" means an individual employed on a vessel of the Administration who has the necessary expertise to serve in the engineering, deck, steward, electronic technician, or survey department.
33 U.S.C. § 3079b