S.C. Code § 16-11-845
It is unlawful for any person (a) to use a converter or similar device for the reception of intelligible signals without the authorization of the operator of the cable television system, (b) to sell a converter or similar device to any other person with knowledge that the person intends to use it for the reception of intelligible signals without the authorization of the operator of the cable television system or, (c) to install a converter or similar device for any other person with knowledge that the person intends to use it for the reception of intelligible signals without the authorization of the operator of the cable television system. This section does not prohibit the manufacture, distribution, or sale of any television receiver in which a converter has been incorporated by the manufacturer.
S.C. Code § 16-11-845