Md. Code, Environment § 9–513

In Baltimore County or Carroll County, the county approving authority may grant an exception to the county plan that allows a person to install an individual water supply system or an individual sewerage system for an individual residence if the Secretary or a designee of the Secretary:

(1) Finds that this exception to the county plan is justified and necessary to alleviate extreme hardship; and

(2) Approves the exception to the county plan.