Claims to refunds allowed to be set off under this article must be made by a claimant agency filing a written notice with the department of its intention to effect collection through setoff under this article. The following is the order of priority for multiple claims filed:
Priority within a class in which multiple claims are filed is the order in time in which the claimant agencies filed the written notice with the department of the intention to effect collection through setoff under this article.
S.C. Code § 12-56-70