C.R.S. § 22-30.5-112.5

If a charter school’s charter or contract includes provision of transportation services by the school district, the charter school and the school district shall collaborate in developing a transportation plan to use school district equipment to transport students enrolled in the charter school to and from the charter school and their homes and to and from the charter school and any extracurricular activities. The transportation plan may include, but need not be limited to, development of bus routes and plans for sharing the use of school district equipment for the benefit of students enrolled in charter schools of the school district and students enrolled in other schools of the school district.