The Secretary may make such rules, regulations, and orders, and require such reports, 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, whether operating in one or more jurisdictions; 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, law books, 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, and as may be appropriated for by Congress. This chapter shall not abrogate nor nullify any other statute, whether State or Federal, dealing with the same subjects as this chapter; but it is intended that all such statutes shall remain in full force and effect except insofar as they are inconsistent herewith or repugnant hereto.