Maryland Code, Tax-Property § 9-108

(a) Subject to subsection (b) of this section, the governing body of a county or municipal corporation shall grant a property tax credit under this section against the applicable county or municipal property tax imposed on vehicles valued as stock in business in an amount equal to:

(b) In addition to the property tax credit required under subsection (a) of this section, for the taxable year beginning July 1, 2019, and each taxable year thereafter, the governing body of a county or municipal corporation may grant a property tax credit under this section against the applicable county or municipal property tax imposed on vehicles valued as stock in business in an amount up to 100% of the tax imposed on those vehicles.

(c) In addition to the property tax credit required under subsection (a) of this section, the governing body of a county or municipal corporation shall grant a property tax credit under this section against the applicable county or municipal property tax imposed on vehicles valued as stock in business in an amount equal to any increase in property tax resulting from an increase in the percent of assessment over the percent of assessment which was in effect for fiscal year 1989.