Md. Code, Tax - Property § 7–210

(a) Except as otherwise provided in § 6-102 of this article and except as otherwise provided under this section, government-owned property is not subject to property tax, if the property:

(1) is devoted to a governmental use or purpose; and

(2) is owned by:

(i) the federal government;

(ii) the State;

(iii) a county or a municipal corporation; or

(iv) an agency or instrumentality of the federal government, the State, a county, or of a municipal corporation.

(b) The exemption provided for the property owned by an agency or instrumentality in subsection (a)(2)(iv) of this section applies only to the extent that a law exempts the property.