Md. Code, Local Government § 21–621

(a) This part does not impair the rights of Prince George’s County or the

City of Bowie to contract with each other for the provision of stormwater

management.

(b) This part does not impair the rights of Prince George’s County or the

City of Takoma Park to contract with each other, or with other parties, for the

provision of stormwater management.