S.C. Code Ann. § 44-77-65: Supplementation of declaration under prior or foreign law with artificial nutrition and hydration instructions.

A declarant whose declaration is executed in accordance with earlier versions of this chapter or in accordance with the law of another state may supplement that declaration by executing a document containing the provisions for "Instructions Concerning Artificial Nutrition and Hydration" as provided for in Section 44-77-50 which must be signed by the declarant and witnessed in accordance with this chapter.