Notwithstanding the foregoing provisions of this chapter, the
Secretary is authorized and directed to provide for the execution
by the Production and Marketing Administration of such powers
conferred upon him under sections 590g, 590h, 590i, and 590j to
590n of this title as he deems may be appropriately exercised by
such Administration, and for such purposes the provisions of law
applicable to the appointment and compensation of persons employed
by the Production and Marketing Administration shall apply.