The Mayor and City Council of Baltimore City or the governing body of a county or municipal corporation may grant, by law, a tax credit against the county or municipal corporation property tax imposed on residential real property that is owned by and is the primary dwelling of an employee of the public school system of the county where the residential real property is located. The Mayor and City Council of Baltimore City or the governing body of a county or municipal corporation may provide, by law, for: the amount and duration of the tax credit under this section; additional eligibility criteria for the tax credit under this section; and any other provision necessary to carry out this section.