(a) The Administrator of General Services is authorized by 40 U.S.C. § 585 to enter into a lease agreement for the accommodation of a Federal agency in a building (or improvement) which is in existence or being erected by the lessor for the accommodation of the Federal agency. The lease agreement may not bind the Government for more than 20 years.

(b) The contracting officer has exclusive authority to enter into and administer leases on the Government's behalf to the extent provided in the certificate of appointment as a contracting officer. Nothing in this paragraph is intended to limit the contracting officer's authority to designate, consistent with statute and regulation, a contracting officer's representative.