D.C. Code § 32-581.04b: Rules of construction.

The rights, remedies, and prohibitions accorded by the provisions of this chapter are in addition to and cumulative of any right, remedy, or prohibition accorded by the common law, federal law, or any District statute, and nothing contained in this chapter shall be construed to deny, abrogate, or impair any such common law or statutory right, remedy, or prohibition.