These monies shall not be used for salaries, benefits or any form of compensation for employees, or for contract employees, administrative costs, debt service except as provided in this subsection (1)(a), personal property or equipment , except for personal property or equipment to be used for the purposes allowed in subparagraphs (i) and (ii) of this subsection (1)(a), or for the construction or maintenance of public buildings or other structures that are not integral to the system of roads and bridges. Unexpended amounts remaining in the fund at the end of a fiscal year shall not lapse into the State General Fund, and any interest earned or investment earnings on amounts in the fund shall be deposited to the credit of the fund.
The department shall distribute funds under this subsection (2) on a semiannual basis with distributions being made in the months of January and July. Rural road miles and rural road population in the counties shall be determined in the same manner as they are determined for the purposes of the distribution formula in Section 65-9-3.
Miss. Code § 27-67-35