S.C. Code Ann. § 35-1-430
Every broker-dealer and broker-dealer agent registration expires at midnight on the last day of the calendar year in which it became effective unless renewed. Every investment adviser registration and federal covered adviser notice filing expires two years from its effective date unless renewed and, unless renewed prior to expiration, every investment adviser representative registration expires at the same time the registration or notice filing of the associated investment adviser or federal covered adviser would expire if not renewed.