The school board of any school district may provide transportation services to children participating in or adults who are attending organized recreational, cultural, educational, and public service programs. The school board shall make a charge for such transportation in an amount equal to the cost thereof, which shall include a reasonable allowance for insurance premiums and depreciation of the vehicles so used. This Section shall not apply if such transportation services are offered by any public or private mass transit system engaged in the business of transporting people within the county or counties in which the school district is located in whole or in part and if such transit system has received or will receive funds provided by the “Mass Transportation Emergency Operating Assistance Act of 1973”, adopted by the 78th General Assembly, or which receives or will receive funds from any other enactment of the General Assembly or from any unit of local government.