(a) If it is in the Government's interest, the contracting officer may authorize cost-reimbursement contractors to obtain, for official purposes only, interagency fleet management system (IFMS) vehicles and related services, including(2) vehicle inspection, maintenance, and repair,(4) commercially rented vehicles for short-term use.(b) Complete rebuilding of major components of contractor-owned or -leased equipment requires the approval of the contracting officer in each instance.(c) Government contractors shall not be authorized to obtain interagency fleet management system (IFMS) vehicles and related services for use in performance of any contract other than a cost-reimbursement contract, except as otherwise specifically approved by the Administrator of the General Services Administration at the request of the agency involved.48 FR 42476, Sept. 19, 1983, as amended at 54 FR 29282, July 11, 1989