Md. Code Ann., Transp. § 22-604
When an emergency vehicle is operating under the provisions of § 21-106 of this article, it is exempt from the sound level limits established under § 22-601 of this subtitle for the operation of vehicles.
Added by Acts 1977, c. 14, § 2, eff. July 1, 1977.
Formerly Art. 66 ½, § 12-701.