The Prevention of Underage Drinking and Access to Alcohol Act of 2007 contains a few provisions dealing with kegs.  Under this new law, businesses that sell kegs must keep a record of every keg that they sell and attach a tag on every keg that leaves the store.  S.C. Code Section 61-4-1920. While this may not prevent minors from gaining access to a keg, it will give police the ability to track down where the keg came from and who purchased it. 

If a person is caught with a keg that has no tag or the information on the tag is not legible, he or she can be fined up to $500 and/or spend up to 30 days in jail.  S.C. Code Section 61-4-1930. 

The penalty for removing a keg tag is the same, a fine up to $500 and/or spend up to 30 days in jail. S.C. Code Section 61-4-1940.