S.C. Code § 61-4-70
A person engaged in the business of selling at retail beer or wine must post in each location for which he has obtained a permit a sign with the following words printed thereon: "The possession of beer, wine, or alcoholic liquors, by a person under twenty-one years of age is a criminal offense under the laws of this State, and it is also unlawful for a person to knowingly give false information concerning his age for the purpose of purchasing beer, wine, or liquor". The department must prescribe by regulation the size of the lettering and the location of the sign on the seller's premises.
A retail seller of beer or wine who fails to display the sign required by this section is guilty of a misdemeanor and, upon conviction, must be fined not more than one hundred dollars or imprisoned for not more than thirty days.
A person found guilty of a violation of Section 61-6-1530 and this section may not be sentenced under both sections for the same offense.
S.C. Code § 61-4-70