Subject to the limitations provided in paragraph (2) and to the extent the Secretary deems such action necessary to the discharge of his functions, he may appoint not more than three hundred eleven of the scientific, engineering, professional, and administrative personnel of the department without regard to the civil service laws, and may fix the compensation of such personnel not in excess of the maximum rate payable for GS–18 of the General Schedule under section 5332 of title 5.

Subject to the provisions of chapter 51 of title 5 but notwithstanding the last two sentences of section 5108(a) 1 of such title, the Secretary may place at GS–16, GS–17, and GS–18, not to exceed one hundred seventy-eight positions of the positions subject to the limitation of the first sentence of section 5108(a) 1 of such title.

Appointments under this subsection may be made without regard to the provisions of sections 3324 of title 5, relating to the approval by the Director of the Office of Personnel Management of appointments under GS–16, GS–17, and GS–18 if the individual placed in such position is an individual who is transferred in connection with a transfer of functions under this chapter and who, immediately before October 1, 1977, held a position and duties comparable to those of such position.

The Secretary’s authority under this subsection with respect to any position shall cease when the person first appointed to fill such position leaves such position.