Maryland Code, Health-General § 10-702

(a)(1) Subject to any reasonable limitation that a facility imposes, each individual in the facility shall have access, at all reasonable hours, to writing instruments, stationery, and postage and may use them to write to anyone.

(2) The correspondence of the individual shall be sent to the addressee without delay, and except under the direction of the addressee, without being opened.

(c)(1) If, for medical reasons, an individual's access to correspondence, writing instruments, or telephones is limited, the limitation shall be:

(2) If the attending physician believes that, because of the condition of an individual, another individual should be permitted to be present when writing instruments are used, the permission and the reasons for the permission shall be: