((a)) ** .—** The base pay of the Under Secretary for Health shall be the annual rate of basic pay for positions at Level III of the Executive Schedule under .
((b)) ** .—**
((1)) In the case of an Under Secretary for Health who is also a physician, podiatrist, optometrist, or dentist, in addition to the base pay specified in subsection (a) the Under Secretary for Health may also be paid the market pay element of pay of physicians and dentists under .
((2)) The amount of market pay of the Under Secretary for Health under this subsection shall be established by the Secretary.
((3)) In establishing the amount of market pay of the Under Secretary for Health under this subsection, the Secretary shall utilize an appropriate health care labor market selected by the Secretary for purposes of this subsection.
((c)) ** .—** Pay under this section shall be considered pay for all purposes, including retirement benefits under chapters 83 and 84 of title 5 and other benefits.