Md. Code, General Provisions § 4–350

(a) A custodian may deny inspection of a public record that contains information concerning the site–specific location of an endangered or threatened species of plant or animal, a species of plant or animal in need of conservation, a cave, or a historic property as defined in § 5A–301 of the State Finance and Procurement Article.

(b) A custodian may not deny inspection of a public record described in subsection (a) of this section if requested by:

(1) the owner of the land on which the resource is located; or

(2) any entity that is authorized to take the land through the right of eminent domain.