A balance of money requisitioned from the unemployment trust fund under § 41-33-180 which remains unclaimed or not disbursed in those accounts after the expiration of the period for which the sums were requisitioned either must be deducted from estimates for, and used in the payment of, benefits during succeeding periods or, in the discretion of the department, must be redeposited with the Secretary of the Treasury of the United States to the credit of this State’s account in the unemployment trust fund, as provided in § 41-33-50.