The board of a school district may purchase a bus body, a chassis, or a complete bus, provided the body, chassis, or complete bus meets standards provided by section 39-21-27.1. A board may use money in its general fund to purchase a bus body, a chassis, or a complete bus on an installment plan, provided the plan does not extend beyond six years.
N.D.C.C. § 15.1-09-43