92 Ill. Adm. Code 449.30
Installation, Maintenance and Operation
Section 449
Section 449.30 Installation,
Maintenance and Operation
a) No person may operate a school bus which is equipped to use
Liquified Petroleum Gas as a fuel propellant unless the installation,
maintenance and operation is in accordance with the National Fire Protection
Association's (NFPA) Standard for the Storage and Handling of Liquefied
Petroleum Gases, NFPA 58, February 6, 1989, not including any later editions or
amendments.
b) No person may operate a school bus which is equipped to use
Compressed Natural Gas as a fuel propellant unless the installation,
maintenance and operation of the fuel system is in accordance with NFPA 52, Standard
for Compressed Natural Gas, (CNG) Vehicular Fuel Systems, June 8, 1988, not
including any later amendments or editions.