The Secretary may make such rules, regulations, and orders as may be necessary to carry out the provisions of this chapter, and may cooperate with any department or agency of the Government, any State, Territory, District, or possession, or department, agency, or political subdivision thereof, or any person; and shall have the power to appoint, remove, and fix the compensation of such officers and employees not in conflict with existing law, and make such expenditures for rent outside the District of Columbia, printing, binding, telegrams, telephones, lawbooks, books of reference, publications, furniture, stationery, office equipment, travel, and other supplies and expenses, including reporting services, as shall be necessary to the administration of this chapter in the District of Columbia and elsewhere, from the Perishable Agricultural Commodities Act fund provided for by section 499c(b) of this title and any supplements to such fund, and as may be appropriated for by Congress; and there is authorized to be appropriated, out of any money in the Treasury not otherwise appropriated, such sums as may be necessary for such purposes. This chapter shall not abrogate nor nullify any other statute, whether State or Federal, dealing with the same subjects of this chapter; but it is intended that all such statutes shall remain in full force and effect except insofar only as they are inconsistent herewith or repugnant hereto.