District of Columbia Code Division VIII. General Laws. § 50-742. Authorization to participate in regional programs limiting greenhouse gas emissions.

(1) Commit the District to participation or membership in any regional governmental initiative, agreement, or compact for the purpose of limiting greenhouse gas emissions from the transportation sector;  and

(2) Impose a fee on motor fuel sales or distribution;  provided, that Maryland or Virginia imposes a state-wide greenhouse gas emissions fee on motor fuel sales or distribution;  provided further, that the District fee is no more than that imposed by Maryland or Virginia.