(1) The trustees of a district may provide school bus transportation to any pupil of a public school who is not an eligible transportee of the district:
(a) on a school bus conveying eligible transportees when the ineligible transportee will not displace an eligible transportee from the school bus because of the lack of seating capacity;
(b) on a school bus operated by the district for the sole purpose of providing transportation for ineligible transportees. The school bus must service those children living the greatest distance from the school to be attended.
(c) on a school bus operated for the purpose of relieving congestion in a school building or to avoid the necessity of erecting a new building or for any other reasons of economy or convenience.
(2) When the trustees of a district provide school bus transportation to an ineligible transportee under the conditions of subsection (1)(a) or (1)(b), the district may charge each ineligible transportee a proportionate share, as determined by the trustees, of the cost of operating the school bus. Money realized from the payments must be deposited to the credit of the transportation fund.