(2) In addition to the aggregate amount allowed of a payroll in subsection (1) of this section, the department may assess a fee equal to the State Treasury short term investment pool interest rate against any portion of any payroll reimbursement the source of funds of which is other than from a General Fund appropriation, and which is transmitted to the department 45 or more days after the issue date of the payroll. All moneys received by the department under the provisions of this subsection shall be deposited in the State Treasury to the credit of the General Fund. [1955 c.495 §5; 1961 c.108 §10; 1967 c.454 §81; 1969 c.378 §4; 1991 c.611 §1]