Source: https://www.brennancenter.org/analysis/movers-guide-south-carolina
Timestamp: 2019-04-24 17:54:44+00:00

Document:
If you moved to South Carolina from another state, you must register to vote in South Carolina to be able to vote. The last day to register in time to vote in the next election is thirty days before the election.
If you moved from out of state, you may register to vote the same day you become a resident of the State of South Carolina. And, under federal law, if you move within thirty days of a presidential election, you are allowed to vote for President and Vice President in your former state of residence, either in person or by absentee ballot.
I moved within South Carolina.
If you moved within the same county, you should fill out a form to update your registration records. You can update your registration records before and on Election Day. That form is available here: http://www.scvotes.org/2006/10/04/update_your_voter_registration_information.
If you moved to a different county more than thirty days before an election, you should complete a new registration form to update your registration records. That form is available here:http://www.scvotes.org/south_carolina_voter_registration_information.
Many registered South Carolina voters who move are still entitled to cast a ballot that will be counted — even if they did not notify the appropriate election official about the move before Election Day.
Vote a provisional ballot for only federal, statewide, countywide and municipal-wide offices at the polling place associated with your old address after affirming your change of address.
Vote a provisional ballot for only federal, statewide, countywide and municipal-wide offices at the polling place associated with your old address after affirming your change of address. The provisional ballot will be counted if the board of voter registration determines you are a qualified elector in the precinct in which you voted.
If you have moved to a new address in a different county more than 30 days before an election, you should complete a new registration form to update your record for your new address.
 S.C. Code Ann. § 7-5-110.
 S.C. Code Ann. §§ 7-5-150, 7-5-155(a)(1).
 See S.C. Code Ann. § 7-5-330(F).
 S.C. Code Ann. § 7-5-440 (2010); see also South Carolina State Election Commission, South Carolina Voter Registration Information: Update Your Registration Information, http://www.scvotes.org/south_carolina_voter_registration_information (last visited on June 4, 2010).
 See S.C. Code Ann. §§ 7-5-120 (must register at the county where the voter resides); 7-5-440 (Voter not required to reregister before the election if move is within 30 days of the election).
 S.C. Code Ann. § 7-5-440(A) (2010); 42 U.S.C. § 1973gg-6(e)(1) (2010).
 S.C. Code Ann. § 7-5-440(B)(1).
 S.C. Code Ann. § 7-5-440(B)(2).

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