S.C. Code Ann. § 40-10-42: Renewal of license.

(A) Each licensee shall apply to the department for license renewal before the license expiration date on a form prepared by the department. Renewal applications not postmarked by the expiration date result in a lapse license cancellation. An entity that fails to renew and continues to engage in fire sprinkler work is practicing without a license and subject to the penalties prescribed in this chapter.

(B) A license not renewed after ninety days from the expiration date cannot be considered for renewal. An initial application form and fees and late renewal penalty must be submitted to obtain a new license. The licensee shall submit documentation of a current comprehensive general liability insurance policy for all license renewals.

(C) Any change that varies from the license's renewal application must be reported to the department within fifteen days from the date of the change.