The County may accept a credit card, issued by a company with which the County has an agreement, in payment of property taxes. The County may enter into an agreement with the issuer of a credit card, which permits the County to add a service charge to the amount owed to the County. If a person uses a credit card to pay an amount owed to the County for property taxes, the County may add the service charge to the amount owed. A service charge assessed under this Subsection: May not exceed the amount charged to the County for use of the credit card; and Shall be determined at the time the amount is paid. A property tax bill shall specify: That a credit card may be used to pay the taxes owed; The types of cards that may be used; and That if a credit card is used to pay the taxes, a service charge may be added to the amount owed.