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