(c) This trust shall be used and administered exclusively for the purpose of AS 39.30.010 — 39.30.080. Withdrawals may be made only for
- (1) payment of amounts required to be paid to the secretary of the treasury by an agreement entered into under AS 39.30.010;
- (2) payment of the refunds provided for in AS 39.30.020(c); and
- (3) refunds of overpayments, not otherwise adjustable, made by a political subdivision or instrumentality.