In order to vote, South Carolina law requires one must first register to vote at least 30 days prior to the election. To be eligible to register in South Carolina you MUST:
Residency
There is no length of residency requirement in South Carolina in order to register to vote. You can register at any time.
Students
Students may register to vote where they attend college only if they establish that they are a resident of that community. In establishing such residence, students must demonstrate that they have a present intention to remain in the community.