Sec. 11.21.02.04. General Requirements for the Emissions Test

A. A person may not cause, allow, or permit the operation of a diesel vehicle on any highway in Maryland, if the vehicle:

(1) Discharges exhaust emissions, the opacity of which exceeds the applicable emissions opacity standards under Regulation .06 of this chapter; or

(2) Has emission control, exhaust equipment, or a governor installed either on the vehicle or diesel engine which has been disconnected, detached, or deactivated, or in any other way has been rendered inoperable or less effective than designed by the original equipment or vehicle or engine manufacturer.

B. A diesel vehicle operating on any highway is subject to an emissions test that shall measure the opacity of the exhaust combustion products discharged into the atmosphere by the engine powering the diesel vehicle.