Within ten (10) days after the appropriation (out of which said warrant shall have been drawn) expires under Section 64 of the State Constitution, the State Treasurer shall withdraw the unexpended balance or balances in such bank or banks and shall turn said money back into the general funds of the State Treasury. He shall give such bank or banks credit for such returned balance or balances. The State Fiscal Officer shall, upon such payment back into the general fund, credit the State Treasurer on its account for such warrant.