D.C. Code § 28-4503 : LOCAL BUSINESS AFFAIRS — COMMERCIAL INSTRUMENTS AND TRANSACTIONS — OTHER COMMERCIAL TRANSACTIONS — RESTRAINTS OF TRADE —4503 - Monopolization TEXT PDF It shall be unlawful for any person to monopolize, attempt to monopolize, or combine or conspire with any other person or persons to monopolize any part of trade or commerce, all or any part of which is within the District of Columbia. D.C. Code § 28-4503 Mar. 5, 1981, D.C. Law 3-169, § 2, 27 DCR 5368.