For any diesel-powered motor vehicle registered and operated in this State to emit for longer than five consecutive seconds under any mode of operation visible air contaminants which are equal to or darker than the shade or density designated as No. 1 on the Ringelmann Chart or equal to or dark than a shade or density of twenty percent (20%) opacity.

Any person charged with a violation of this section shall be allowed 30 days within which to make the necessary repairs or modification to bring the motor vehicle into conformity with the standards of this section and to have the motor vehicle inspected and approved by the agency issuing the notice of violation. Any person who, within 30 days of receipt of a notice of violation, and prior to inspection and approval by the agency issuing the notice, receives additional notice or notices of violation, may exhibit the first notice in lieu of inspection and approval by the agencies issuing the subsequent notices.