Nothing in §§ 10-117 to 10-119 shall be construed as curtailing the power of the Secretary of the Interior to sell the remainder of parcel 4 as provided for in Public Law No. 299, 72nd Congress, and should the exchange and dedication as provided for in § 10-117 fail to become effective the Secretary of the Interior is still authorized to sell the entire area of parcel 4 as provided for in that Act.
D.C. Code § 10-119