Regional Transport Officer or as commonly known as RTO is a licensing, registration, taxation authority of a particular region. It is empowered to cancel the valid fitness certificate of vehicle if it is caught in mechanically unfit and unroadworthy condition.
The RTO official has the power to issue memo for the breach of provisions of motor vehicle act and rules. These memo generally consists of description of the offence, seal and signature of the issuing authority. The document is impounded only for minor offences.
Each RTO, while issuing license plates, have their own code which is broken down into states or Union Territories, and their districts. Take for example, if Port Blair issues a license, its code is AN-01. AN is the code for Andaman & Nicobar Islands and 01 is the code for Port Blair in the Andaman District