Prohibiting a merchant, in a certain transaction, from prohibiting a person from making a cash payment to purchase a good or service; requiring a person to purchase a good or service by using a credit or debit card, or charging or collecting from a person a fee for making a cash payment for the purchase of a good or service; and establishing that a violation of the Act is an unfair, abusive, or deceptive trade practice subject to certain enforcement and penalty provisions under the Maryland Consumer Protection Act.