Maryland Code, Real Property § 11B-114

(a) In this section, “electronic payment” means payment by credit card or debit card.

(b) A homeowners association may require a person from whom payment is due to pay a reasonable electronic payment fee if the person elects to pay the homeowners association by means of electronic payment.

(c) An electronic payment fee may not exceed the amount of any fee that may be charged to the homeowners association in connection with use of the credit card or debit card.

(d) If a homeowners association elects to charge an electronic payment fee under this section, the homeowners association shall specify on or include notice with each bill and other invoices for which electronic payment is authorized that an electronic payment fee will be charged.