Md. Code Ann., Cts. & Jud. Proc. § 5-414
An association or organization participating or interested in a labor dispute, as those terms are defined under the Labor and Employment Article, or an officer or member of the association or organization, may not be held responsible or liable in a civil action at law or suit in equity, or in any criminal prosecution, for the unlawful acts of individual officers, members, or agents, except on proof by the weight of evidence and without the aid of any presumptions of law or fact, both of:
Added as Courts and Judicial Proceedings § 5-342 by Acts 1990, c. 546, § 3, eff. Oct. 1, 1990. Amended by Acts 1993, c. 5, § 1, eff. March 16, 1993. Renumbered as Courts and Judicial Proceedings § 5-414 by Acts 1997, c. 14, § 9, eff. April 8, 1997.