Okla. Stat. tit. 70, § 70-9-115: Care of equipment

Any school district leasing any such pupil-transportation

equipment from the State Board of Education shall at its own cost

and expense procure such equipment from the State Board of

Education, keep such equipment, including all tires, tubes and

accessories thereon and therewith, in good repair during the time

the same shall be in its possession, and, at the expiration of the

term of such lease, unless such equipment be purchased or again

leased by such district, return such equipment to the State Board of

Education in as good condition as when received, ordinary wear and

tear alone excepted. Any tire or tube needing to be replaced while

such equipment is in the possession of a school district shall be

replaced by, and at the expense of, such district.