S.C. Code Ann. § 62-7-506: Overdue distribution.

Whether or not a trust contains a spendthrift provision, a creditor or assignee of a beneficiary may reach a mandatory distribution of income or principal, including a distribution upon termination of the trust, if the trustee has not made the distribution to the beneficiary within a reasonable time after the designated distribution date. For purposes of this section, a mandatory distribution is a distribution where the trustee has no discretion in determining whether the distribution shall be made or the amount or timing of such distribution.