Md. Code Ann., Com. Law § 13-312
Any subpoena served on an entity which issues a credit card to a person in this State for information relating to the person's account shall contain a certification that complies with § 1-304 of the Financial Institutions Article.
Added by Acts 1976, c. 340, § 1, eff. July 1, 1976. Amended by Acts 1986, c. 412.