Section 114(2) in The Chhattisgarh Motor Vehicles Rules, 1994
(2)A public service vehicle when regularly used for carrying postal mail by or under a contract with the posts and telegraphs department, may exhibit in a conspicuous place upon a plate or a plain surface of the motor vehicle the words "Mail" in red colour on a white ground, each letter being not less than fifteen centimetres in height and of a uniform thickness of two centimetres.
