Maryland Code, Public Utilities § 7-314

(a) This section applies to electric companies, electric cooperatives, and municipal utilities that offer customer choice for competitive electricity supply under Subtitle 5 of this title.

(b) A residential electric customer who has a change in the service address associated with the customer's electricity account may maintain the customer's competitive electricity supply contract for the new address if the new address is within the same electric territory as the old address.

(c) An electric company may not terminate a customer's contract due to a change of address for the service address associated with the contract if the requirements under subsection (b) of this section are met.

(d) An electric company shall make any changes necessary to accommodate a customer's change of address on notification by the customer.