This subpart prescribes policy and procedures for acquisition of commercial software and software maintenance, including software and software maintenance that is acquired—

(a) As part of a system or system upgrade, where practicable;

(b) Under a service contract;

(c) Under a contract or agreement administered by another agency (e.g., under an interagency agreement);

(d) Under a Federal Supply Schedule contract or blanket purchase agreement established in accordance with FAR 8.405; or

(e) By a contractor that is authorized to order from a Government supply source pursuant to FAR 51.101.