When Federal agencies do not exercise the delegation of authority for general purpose space mentioned in Sec. 102-72.30(b) of this part, GSA may consider granting an ACO delegation when Federal agencies--
(a) Occupy at least 90 percent of the building's GSA-controlled space, or Federal agencies have the written concurrence of 100 percent of rent-paying occupants covered under the lease; and
(b) Have the technical capability to perform the leasing function.