(a) The annual rates or ranges of rates of basic pay for positions provided in section 7306 of this title shall be prescribed from time to time by Executive order as authorized by chapter 53 of title 5 or as otherwise authorized by law. The pay of physicians and dentists serving in positions to which an Executive order applies under the preceding sentence shall be determined under subchapter III of this chapter instead of such Executive order.

(b) The grades for positions provided for in paragraph (1) of section 7401 of this title shall be as follows. The annual ranges of rates of basic pay for those grades shall be prescribed from time to time by Executive order as authorized by chapter 53 of title 5 or as otherwise authorized by law: physician and dentist schedule nurse schedule clinical podiatrist, chiropractor, and optometrist schedule

(c) Notwithstanding the provisions of section 7425 (a) of this title, a person appointed under section 7306 of this title who is not eligible for pay under subchapter III shall be deemed to be a career appointee for the purposes of sections 4507 and 5384 of title 5.

(d) Except as provided under subchapter III and in section 7457 of this title, pay for positions for which basic pay is paid under this section may not be paid at a rate in excess of the rate of basic pay authorized by section 5316 of title 5 for positions in Level V of the Executive Schedule.