Here’s the Bill   http://www.scstatehouse.gov/sess121_2015-2016/bills/672.htm

There’s some more detail in this piece  published by Mic.com

http://mic.com/articles/128358/marijuana-legalization-south-carolina-could-state-legalize-medical-pot#.5o0IbvRHY

They write

“Under the new legislation, the state would loosen restrictions on purchasing medical marijuana, allowing a slew of new customers to buy the drug from licensed dispensaries. The law would also allow for an unlimited amount of THC, the ingredient in cannabis that can provide relief from certain medical symptoms (as well as psychoactive side effects).”