For a solicitation amendment, change order, or administrative change, the effective date shall be the date on which the contracting officer issues the amendment, change order, or administrative change.
For a bilateral modification (supplemental agreement), the effective date shall be the date agreed upon by the contracting officer and the contractor.
For a modification converting a termination for default to a termination for the convenience of the District, the effective date shall be the same as the effective date of the termination for default.
For a modification issued as a confirming notice of termination for the convenience of the District, the effective date of the confirming notice shall be the same as the effective date of the initial notice.
D.C. Mun. Regs. tit. 27, r. 27-3606