Except as provided in paragraph (2) of this subsection, the governing body of a county or municipal corporation may grant, by law, a property tax credit for up to 100% of the county or municipal property tax imposed on business personal property that is computer software. A credit against the county or municipal property tax may not be granted for personal property already exempt from taxation under § 7-238(b) of this article. The governing body of a county or municipal corporation may adopt procedures to determine the amount and the conditions of eligibility and method of application of the property tax credit.