Md. Code, Environment § 7–251

A hauler certificate authorizes its holder to transport a controlled hazardous substance while the certificate is effective and may require:

(1) Use of specific routes, designated after consultation with the Department of Transportation, to a controlled hazardous substance facility;

(2) Use of certain types of vehicles, equipment, or handling procedures; and

(3) Satisfaction of other conditions which the Department determines to be reasonably necessary to assure, to the extent possible, transportation of controlled hazardous substances in a safe and secure manner.