Section 50(2)(d) in The Central Motor Vehicles Rules, 1989
(d)[ the letters of the registration mark shall be in English and the figures shall be in Arabic numerals and shall be shown: [Clause (d) substituted by GSR 901(E), dated 13.12.2001 (w.e.f. 13.12.2001). Earlier Clause (d) was substituted by GSR 221(E), dated 28.3.2001 (w.e.f. 28.3.2001).](A)in the case of transport vehicles in black colour on yellow background; and(B)in other cases, in black colour on white background, the registration mark on the trailer shall be exhibited on the left hand side in black colour on yellow background. In addition, the registration mark on the drawing vehicle shall be exhibited on the trailer also and this shall be done on the right hand side at the rear of the trailer or the last trailer as the case may be, in black colour on retro-reflective type yellow background: