(a) Nothing in this part will preclude the Secretary, the Administrator, or the Deputy Administrator from administering any or all programs, or exercising other functions delegated to the county committee, State committee, or any employee of such committees.

(b) In exercising this authority, the Secretary, the Administrator, or the Deputy Administrator may designate for such period of time as deemed necessary a person or persons of their choice to be in charge with full authority to carry out the programs or other functions without regard to the normal duties of such committees or employees.