S.C. Code Ann. § 63-19-430: Bumper sticker sales.

The department may print or purchase for resale bumper stickers and other informational material prepared to publicize and educate the public concerning activities of the department. All these materials must have "South Carolina" inscribed on the material. After the costs of the materials have been recovered, all proceeds from the sale of the materials must be deposited in the student welfare fund of the department and used for the purposes prescribed for that fund.