Section 90(1) in The Central Motor Vehicles Rules, 1989
(1)[ All motor vehicles other than a trailer or modular hydraulic trailer] [Inserted by Notification No. G.S.R. 212 (E) dated 20.3.2015 (w.e.f. 1.4.2015)] plying under a national permit shall be painted in dry leaf brown colour with thirty centimetres broad white borders and the words National permit shall be inscribed on both sides of the vehicle in bold letters within a circle of sixty centimetres diameter:Provided that the body of a tanker carrying dangerous or hazardous goods shall be painted in white colour with a dry leaf brown ribbon of 5 centimetres width around in the middle at the exterior and that of the drivers cabin in orange colour.
