South carolina constitution
Article IV: executive department
Section 11

In the case of the removal of the Governor from office by impeachment, death, resignation, disqualification, disability, or removal from the State, the Lieutenant Governor shall be Governor. In case the Governor be impeached, the Lieutenant Governor shall act in his stead and have his powers until judgment in the case shall have been pronounced. In the case of the temporary disability of the Governor and in the event of the temporary absence of the Governor from the State, the Lieutenant Governor shall have full authority to act in an emergency. In the case of the removal of the Lieutenant Governor from office by impeachment, death, resignation, disqualification, disability, or removal from the State, the Governor shall appoint, with the advice and consent of the Senate, a successor to fulfill the unexpired term.