New to South Carolina? If you recently moved to South Carolina and already have an out-of-state motorcycle license/endorsement, you’ll need to transfer your credentials within 90 days of moving to the state. Visit your local SC Department of Motor Vehicles (SCDMV) office location and: Surrender your out-of-state license/endorsement.

https://www.dmv.org/sc-south-carolina/motorcycle-license.php