92 Ill. Adm. Code 449.10
Purpose and Scope
Section 449
Section 449.10 Purpose and
Scope
a) This Part governs the use of liquefied petroleum gases (LPG)
and compressed natural gas (CNG) as propellant fuel in school buses. The
installation, maintenance and operation of such fuel systems are covered by
this Part.
b) The installation of an alternate fuel system, using compressed
or liquefied gases, shall not conflict with any Federal Motor Vehicle Safety
Standard or any requirements of this Subchapter applicable to school buses.