Md. Code, Transportation § 22–104

A person may not willfully or intentionally remove or alter any safety device or equipment that has been placed on any motor vehicle, trailer, semitrailer, or pole trailer in compliance with any law, rule, regulation, or requirement of any officer or agency of the United States or of this State, if it is intended that the vehicle be operated on highways in this State, unless the removal or alteration is permitted by rule or regulation adopted by the Administrator.