S.C. Code Ann. § 61-4-100
If a person is charged with a violation of Section 61-4-50 (the unlawful sale of beer or wine to minors), the minor must also be charged with a violation of Section 20-7-8920 (unlawful purchase or possession of beer or wine). In addition, if the minor violated Section 61-4-60 (false information as to age) or if an adult violated Section 61-4-80 (unlawful purchase of beer or wine for a person who cannot lawfully buy), these persons must also be charged with their violations.
Unless the provisions of this section are complied with, no person charged with a violation of Section 61-4-50 may be convicted of the offense.
Nothing in this section requires that charges made pursuant to this section be prosecuted to conclusion; but rather this determination must be made in the manner provided by law.