43.103  Types of contract modifications.

Contract modifications are of the following types:

(a)  Bilateral. A bilateral modification (supplemental agreement) is a contract modification that is signed by the contractor and the contracting officer. Bilateral modifications are used to-

(1)  Make negotiated equitable adjustments resulting from the issuance of a change order;

(2)  Definitize letter contracts; and

(3)  Reflect other agreements of the parties modifying the terms of contracts.

(b)  Unilateral. A unilateral modification is a contract modification that is signed only by the contracting officer. Unilateral modifications are used, for example, to-

(1)  Make administrative changes;

(2)  Issue change orders;

(3)  Make changes authorized by clauses other than a changes clause (e.g., Property clause, Options clause, or Suspension of Work clause); and

(4)  Issue termination notices.