(a) If this subtitle conflicts with an order, rule, regulation, or requirement of the federal Surface Transportation Board or the department relating to a vehicle safety requirement, including a requirement relating to vehicle equipment, compliance by the owner or operator of the vehicle with the order, rule, regulation, or requirement of the federal Surface Transportation Board or the department is compliance with this subtitle.
(b) The owner or operator of a vehicle shall comply with any requirement of this subtitle that is in addition to, but not in conflict with, a requirement of the federal Surface Transportation Board or the department.