Air conditioning systems may be installed in school vehicles if: The systems are approved by the Administration; The agency and personnel installing the systems have been certified by the air conditioning manufacturer; There are no sharp edges or protrusions that could injure students; The total vehicle battery capacity is at least 1800 amperes; The vehicle alternator rating is at least 145 amperes; and The system does not contain refrigerant that is: Toxic to persons, or Flammable. System operating controls, including the on-off and blower switch or switches and the thermostat control or controls, shall be accessible to the driver in a seated position. Wiring, hoses, and lines shall be grommeted, routed, and supported so as to reduce wear resulting from heat, chafing, vibration, or other factors. Evaporator cases, lines, and ducting shall be designed so that: All condensation is effectively drained to the exterior of the vehicle below floor level; Under all conditions of vehicle movement they are without leakage on any interior portion of the vehicle; They are inaccessible to passengers; and They do not cross the windows. System components shall be readily available for servicing. An air conditioning grill on the exterior shall be the same color as the predominant area in which it is installed.