Maryland Code, Local Government § 16-108

(b)(1) A governing body of a county or municipality may allow a governmental charge to be paid by credit or debit card.

(2) The governing body of a county or municipality shall determine:

(c)(1) The governing body of a county or municipality may add a service charge to a governmental charge paid by a credit or debit card.

(2) The amount of the service charge:

(1) that a credit or debit card may be used to pay the governmental charge;

(2) the types of credit and debit cards that may be used; and

(3) whether a service charge will be added to the governmental charge if a credit or debit card is used.