Md. Code, Public Utilities § 6–303

(a) Without prior authorization of the Commission, a person may not acquire a controlling interest in any State, county, municipal, or similar not–for–profit water service or sewage disposal service provider, for the purpose of converting the provider into a water company or sewage disposal company.

(b) The Commission may authorize an acquisition under subsection (a) of this section if the Commission finds that the acquisition is consistent with the public convenience and necessity.