Yeah, yeah, yeah...
Yeah, yeah, yeah...
Yeah, yeah, yeah...
https://www.scstatehouse.gov/sess125_2023-2024/bills/3548.htm#:~:text=Section%2016%2D17%2D500.,the%20age%20of%20eighteen%20years. As of January 10th, 2023, the minimum age in SC is 18. I cannot find anything in the Bill that mentions 21 being the minimum age.
Uh. Federal law is that cannabis is illegal, yet that doesn't stop sales. It does effect prosecution when feds decide to, for sure.
The federal minimum age overrides the state. Generally speaking, state laws can be stricter, but not more lenient than federal laws that cover the same subject.