Where a radioactive material shipment has been certified pursuant to the provisions of P.L.1977, c. 233 (C. 26:2D-18 et seq.), and the rules and regulations promulgated pursuant thereto, and it does not require placarding on the outside of the shipping vehicle pursuant to federal law or regulations, the driver or operator of the vehicle shall conspicuously post a placard in the cab to be readily visible from outside the cab of the vehicle bearing the conventional radiation symbol and the words:
"CAUTION: THIS VEHICLE CONTAINS RADIOACTIVE MATERIAL" .
Compliance with this section shall be deemed compliance with section 11 of P.L.1950, c. 128 (C. 39:5B-11).