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.