subject to paragraph (3), the Sergeant at Arms of the Senate and the head of an executive agency (as defined in section 105 of title 5) may enter into a memorandum of understanding under which the agency may provide facilities, equipment, supplies, personnel, and other support services for the use of the Senate during an emergency situation;

the Sergeant at Arms of the Senate and the head of the agency may take any action necessary to carry out the terms of the memorandum of understanding; and

the Sergeant at Arms of the Senate may enter into a memorandum of understanding described in paragraph (1) consistent with the Senate Procurement Regulations.