Md. Code Ann., Transp. § 4-207
Except for water and sewer charges imposed by this State or any of its agencies or political subdivisions, the Authority, its activities, and the property it owns or controls are exempt from all taxes, assessments, and charges, whether federal, State, or local, now or subsequently levied or imposed.
Added by Acts 1977, c. 13, § 2, eff. July 1, 1977. Amended by Acts 1988, c. 110, § 1.
Formerly Art. 94A, § 23.