The Secretary, after consultation with the Marine Mammal Commission, is authorized and directed to issue, as soon as practicable, such regulations, covering the twenty-four-month period referred to in section
of this title, as he deems necessary or advisable, to reduce to the lowest practicable level the taking of marine mammals incidental to commercial fishing operations. Such regulations shall be adopted pursuant to section
. In issuing such regulations, the Secretary shall take into account the results of any scientific research under subsection (a) of this section and, in each case, shall provide a reasonable time not exceeding four months for the persons affected to implement such regulations.