((a)) ** Administration by agreement with other agency or agencies** The Secretary may administer any or all of the provisions of this part through Memorandum of Agreement with the head of any appropriate Federal agency.

((b)) ** Regulations** The head of the agency administering this part or provisions thereof (including any agency head administering such Act  or provisions through a Memorandum of Agreement under subsection (a)) may promulgate such implementing regulations as may be found necessary and appropriate. Initial implementing regulations may be interim final regulations.1