Rules are uniform for all citizens.
Getting NOC for vehicle, while using it in other state, and paying life tax in other state is mandatory. However, central Government personnel can use the vehicle as they require frequent transfers.. This facility is not applicable for sale.
Hence obtaining NOC from RTO and Police of other state, paying life tax in the state in which vehicle has to be used are mandatory. There is no exemption as of now to any one, when he wished to sell.
This NOC is confirmation that the vehicle is not involved in any illegal activities in the earlier state and presumptions can not hold good when there is well laid down rules and regulations.
To sum up getting NOC is a must.