Md. Code, Local Government § 1–903

(a) On request of the Director of the Baltimore City Department of Public

Works, the governing bodies of Anne Arundel County, Baltimore County, or Howard

County shall restrict the use of water supplied by Baltimore City to any person or

property located in the county:

(1) to the same extent restrictions are imposed on the use of water by

consumers in Baltimore City when there is a shortage of water; or

(2) in limited areas when required due to deficiencies in the water

distribution system serving the limited areas under conditions approved by the

receiving county.

(b) Before the imposition of a water restriction in a limited area of Anne

Arundel County, Baltimore County, or Howard County, the Director of the Baltimore

City Department of Public Works shall determine that the unrestricted use of water

in all other areas of the county will have no detrimental effect on the restricted use

area.

(c) The governing bodies of Anne Arundel County, Baltimore County, and

Howard County may pass any ordinance, resolution, rule, or regulation necessary to

impose and enforce a water restriction under this subtitle and provide penalties for

the violation of a restriction.