D.C. Mun. Regs. r. 27-3603
The contracting officer shall include a changes clause, approved by the Director, in each solicitation and contract.
Each changes clause shall specify the kinds of contract changes that the contracting officer may make within the scope of the contract by written change order at any time and without notice to sureties, if any.
Each changes clause shall include provisions for adjustments in contract price, delivery schedules, or other contract terms which are appropriate to the type of contract.
The contracting officer may issue a written change order when a change can be accomplished within the provisions of the changes clause.
After the contracting officer issues a change order, the contractor shall continue performance of the contract as changed. In cost-reimbursement contracts, the contractor shall not be obligated to continue performance or incur costs beyond the limits established in the contract.
D.C. Mun. Regs. r. 27-3603