D.C. Code § 6-321.06

Nothing contained in this subchapter shall be construed as requiring the said Council of the District of Columbia to transfer the right, title, and interest in and to so much of the property described in § 6-321.01 as the Council may determine, in its discretion, is required for municipal purposes or is to continue to be owned by the United States under the jurisdiction of the Mayor, for the benefit of the District of Columbia.