Md. Code Ann., Envir. § 9-517
(2) Access to a community sewerage system is prohibited by an order of:
In Montgomery County or Prince George's County, the comprehensive plan for water supply systems and sewerage systems may allow the installation and use of an individual sewerage system for an interim period until the necessary sewerage transmission and treatment capacity in the area is available to provide adequate community sewerage service if:
Added by Acts 1983, c. 542, § 2.