An OA defines GSA's relationship with each customer agency and:
(a) Establishes specific financial terms, provisions, rights, and obligations of GSA and its customer for each space assignment;
(b) Minimizes exposure to future unknown costs for both GSA and customer agencies;
(c) Stabilizes Rent payments to the extent reasonable and desired by customers; and
(d) Allows tailoring of space and related services to meet customer agency needs.