S.C. Code Ann. § 44-43-345: Gift of decedent's body or part; documentation; revocation.

(A) A person authorized to make an anatomical gift under Section 44-43-340 may make an anatomical gift by a document of gift signed by the person making the gift or by that person's oral communication that is electronically recorded or is contemporaneously reduced to a record and signed by the individual receiving the oral communication.

(B) Subject to subsection (C), an anatomical gift by a person authorized under Section 44-43-340 may be amended or revoked orally or in a record by any member of a prior class who is reasonably available. If more than one member of the prior class is reasonably available, the gift made by a person authorized under Section 44-43-340 may be:

(1) amended only if a majority of the reasonably available members agree to the amending of the gift; or

(2) revoked only if a majority of the reasonably available members agree to the revoking of the gift or if they are equally divided as to whether to revoke the gift.

(C) A revocation under subsection (B) is effective only if, before an incision has been made to remove a part from the donor's body or before invasive procedures have begun to prepare the recipient, the procurement organization, transplant hospital, physician, or technician knows of the revocation.