There is created in the State Treasury a special fund to be designated as the "State BP Settlement Fund." The special fund shall consist of funds required to be deposited into the special fund by Section 27-103-302, funds appropriated or otherwise made available by the Legislature in any manner, and funds from any other source designated for deposit into the special fund. Unexpended amounts remaining in the special fund at the end of a fiscal year shall not lapse into the State General Fund but shall remain in the State BP Settlement Fund. Any investment earnings or interest earned on amounts in the special fund shall be deposited to the credit of the special fund.