(a) It is the duty of the county trustee or individual having similar responsibilities and duties in counties where such responsibilities and duties are vested in another office by law to:

(1) Keep all public school funds separate and apart from all other funds coming into the trustee's or individual's hands. It is unlawful to pay out any elementary school funds for high school purposes or high school funds for elementary school purposes, or either fund for any other purpose than that for which it was levied or collected;

(2) Make a settlement with the county mayor of all elementary school funds and high school funds from all sources, quarterly, within ten (10) days after the close of the quarters ending with March, June, September and December, which settlement shall include all receipts and expenditures within the quarter. This settlement shall be included in the next quarterly report of the county director of schools to the county legislative body and to the commissioner of education;

(3) Make annual reports, on or before July 10 each year, to the commissioner of all receipts and expenditures of all elementary and all high school funds within the year ending June 30 preceding, on forms supplied by the commissioner;

(4) Require the county director of schools to attach a voucher to every school warrant amounting to five hundred dollars ($500) or more drawn by the county board of education for any purpose other than the salaries of the supervisors and teachers, showing that the board has complied with the law requiring contracts to be let on competitive bids. Nothing in this subdivision (a)(4) shall be construed to remove the requirement of competitive bidding prior to the letting of such contracts; and

(5) Make quarterly distribution of all state and county elementary school funds between the county and incorporated city or cities of the county on the basis of average daily attendance immediately after each quarterly settlement with the county mayor; provided, that the state school fund designated as the equalizing fund shall not be distributed on such basis, but shall be placed to the credit of the county elementary school fund to be disbursed by the county board of education as provided in this title.

(b) A violation of subsection (a) is a Class C misdemeanor.