Maryland Code, Commercial Law § 22-605

(a) In this section, “automatic restraint” means a program, code, device, or similar electronic or physical limitation the intended purpose of which is to restrict use of information.

(b) A party entitled to enforce a limitation on use of information may include an automatic restraint in the information or a copy of it and use that restraint if:

(c) This section does not authorize an automatic restraint that affirmatively prevents or makes impracticable a licensee's access to its own information or information of a third party, other than the licensor, if that information is in the possession of the licensee or a third party and accessed without use of the licensor's information or informational rights.

(d) A party that includes or uses an automatic restraint consistent with subsection (b) or (c) of this section is not liable for any loss caused by the use of the restraint.

(e) This section does not preclude electronic replacement or disabling of an earlier copy of information by the licensor in connection with delivery of a new copy or version under an agreement to replace or disable the earlier copy by electronic means with an upgrade or other new information.

(f) This section does not authorize use of an automatic restraint to enforce remedies in the event of breach of contract or of cancellation for breach.