S.C. Code Ann. § 44-80-80: Execution of POST form; affect on life insurance policy.

(A) The executing of a POST form does not in any manner affect the sale, procurement, or issuance of any policy of life insurance, nor shall it be deemed to modify the terms of an existing policy of life insurance. A policy of life insurance is not legally impaired or invalidated in any manner by the withholding or withdrawal of life-sustaining procedures pursuant to this chapter notwithstanding any term of the policy to the contrary.

(B) Execution of a POST form is voluntary. A health care provider, health care facility, health care service plan, insurer issuing disability insurance, self-insured employee benefit plan, or nonprofit hospital plan may not require any person to execute a POST form as a condition of being insured for, or receiving, health care services.