§ 390.110. Removal of Plates On Transfer of Vehicle — Use By Purchaser.

Upon the transfer of ownership of any motor vehicle or trailer, the certificate of registration and the right to use the number plates shall expire and the number plates shall be removed by the owner at the time of the transfer of possession, and it shall be unlawful for any person other than the person to whom such number plates were originally issued to have the same in his/her possession whether in use or not; except that the buyer of a motor vehicle or trailer who trades in a motor vehicle or trailer may attach the license plates from the trade-in motor vehicle or trailer to the newly purchased motor vehicle or trailer. The operation of a motor vehicle with such transferred plates shall be lawful for no more than thirty (30) days. As used in this Section, the term "trade-in motor vehicle or trailer" shall include any single motor vehicle or trailer sold by the buyer of the newly purchased vehicle or trailer, as long as the license plates for the trade-in motor vehicle or trailer are still valid.