S.C. Code Ann. § 59-150-140
(A) At the execution of the contract with the commission, a lottery vendor shall post a performance bond or letter of credit from a bank or credit provider acceptable to the commission in an amount determined by the commission for that particular bid or contract. Instead of the bond, a lottery vendor, to assure the faithful performance of its obligations, may deposit and maintain with the commission securities that are interest bearing or accruing and that are rated in one of the three highest classifications by an established nationally recognized investment rating service. Securities eligible pursuant to this section are limited to:
(E) In all contracts entered into in connection with this chapter, the resident lottery vendor preference provided in Section 11-35-1524 must apply to procurements made by the commission, except that the following additional provisions apply:
(3) with respect to the procurement of services or advertising, instead of providing the certifications provided in Section 11-35-1524(C), the lottery vendor shall certify in writing in the bid: