Maryland Code, Tax-Property § 7-501

(a) The governing body of Allegany County, Anne Arundel County, Montgomery County, or Washington County or the governing body of a municipal corporation in those counties may authorize, by law, an exemption from county or municipal corporation property tax for the property that is described in § 6-102(e) of this article.

(b) Except for an interest in federal enclave property as defined in § 7-211.3 of this title, in all counties except Worcester County, the governing body of the county or of a municipal corporation in those counties or the Mayor and City Council of Baltimore City may authorize, by law, an exemption from county or municipal corporation property tax for the property described in § 6-102(e) of this article and provide for a negotiated payment in lieu of the tax.

(c) Notwithstanding subsections (a) and (b) of this section, the assessment of any property exempted under subsections (a) and (b) of this section shall be included in the assessable base of the county or municipal corporation to determine the amount of any State aid that is based on the assessable base of the county or municipal corporation.