Md. Code, Crim. Proc. § 2-210

Current with changes from the 2024 legislative session from Chs. 2 through 1049, effective on or before 6/1/2024
Section 2-210 - Trespassing on posted property used for defense-related activity
(a) If a person employed as a watchman or guard believes that a person is trespassing on posted property that is used for a defense-related activity as defined in § 9-701 of the Criminal Law Article, the employee may detain the person and notify a law enforcement officer.
(b) If a law enforcement officer has probable cause to believe that a person has trespassed on posted property that is used for a defense-related activity as defined in § 9-701 of the Criminal Law Article, the law enforcement officer may arrest the person without a warrant for a violation of § 9-702 or § 9-703 of the Criminal Law Article.

Md. Code, CP § 2-210