Md. Code, Alcoholic Beverages and Cannabis § 18–1602

(a) (1) Except as provided in subsection (b) of this section, the Board may not issue a license:

(i) with an on–sale privilege, for an establishment that is within 500 feet of a school accredited by the State Board of Education; or

(ii) with an off–sale privilege, for an establishment that is within 1,000 feet of a school accredited by the State Board of Education.

(2) The distance from the establishment to the school is to be measured in a direct line from the nearest wall of the establishment to the property line of the school.

(b) The prohibition against issuing a license in subsection (a) of this section does not apply to:

(1) a Class B (on–sale) beer, wine, and liquor license issued for an establishment located in a municipality in the county;

(2) a school that locates its building within 500 feet of an existing licensed premises; or

(3) the renewal or transfer of a license issued before May 1, 2014.