Section 128(11) in The Central Motor Vehicles Rules, 1989
(11)Painting and finishing.The tourist vehicle shall be painted in a manner referred to in sub-rules (7) and (8) of rule [85] [Substituted by GSR 276(E), dated 10.4.2007 (w.e.f. 10.4.2007).] in white colour with a blue ribbon of five centimetres width at the centre of the exterior of the body.