3601.1 A contract modification may be either bilateral or unilateral.

3601.2 The contracting officer shall use a bilateral contract modification (also known as a "supplemental agreement") to do the following:

1. (a) Make negotiated equitable adjustments resulting from the issuance of a change order;
2. (b) Formalize a letter contract; or
3. (c) Reflect other agreements of the parties to modify the terms of the contract.

3601.2 The contracting officer shall use a unilateral contract modification to do the following:

1. (a) Make administrative changes, such as correction of typographical errors or appropriations information;
2. (b) Issue change orders;
3. (c) Make changes authorized by a provision of the contract other than a changes clause, such as an option; or
4. (d) Issue a termination notice.

SOURCE: Final Rulemaking published at 35 DCR 1685 (February 26, 1988).