105 ILCS 5/29-3.1: Transportation to and from school sponsored activities.

The school board of any school district that provides transportation for pupils to and from the school attended may provide transportation for pupils to and from any school sponsored activities in which pupils of the district participate, whether during the school year or not, and may make a charge for such transportation in an amount not to exceed the cost thereof, which may include a reasonable allowance for depreciation of the vehicles so used. The school board may provide transportation for pupils on bona fide field trips in Illinois or adjacent states.