(35 ILCS 505/4d)
All special fuel sold or used for non-highway purposes must
contain only the dye Solvent Red 164 at a concentration spectrally equivalent
to at least 3.9 pounds of the solid dye standard Solvent Red 26 per thousand
barrels of special fuel except kerosene-type jet fuel sold for the propulsion
of any aircraft. The dye must be added prior to removal from a terminal rack.
The Department may also require all special fuel sold for non-highway use to
have a marker added.
(Source: P.A. 91-173, eff. 1-1-00.)