The trier of fact may infer that the defendant has knowingly changed, altered, removed, or obliterated the serial number, product identification number, part number, component identification number, owner-applied identification number, or other mark of identification, if the defendant was in possession of any machine or other equipment or a part of such machine or equipment used in the construction, maintenance, or demolition of buildings, structures, bridges, tunnels, sewers, utility pipes or lines, ditches or open cuts, roads, highways, dams, airports, or waterways or in material handling for such projects upon which any such serial number, product identification number, part number, component identification number, owner-applied identification number, or other mark of identification has been changed, altered, removed, or obliterated.
"Commercial context" means a continuing business enterprise conducted for profit by any person whose primary business is the wholesale or retail marketing of household appliances, or a significant portion of whose business or inventory consists of household appliances kept or sold on a wholesale or retail basis.
"Household appliance" means any gas or electric device or machine marketed for use as home entertainment or for facilitating or expediting household tasks or chores. The term shall include but not necessarily be limited to refrigerators, freezers, ranges, radios, television sets, vacuum cleaners, toasters, dishwashers, and other similar household items.
"Manufacturer's identification number" means any serial number or other similar numerical or alphabetical designation imprinted upon or attached to or placed, stamped, or otherwise imprinted upon or attached to a household appliance or item by the manufacturer for purposes of identifying a particular appliance or item individually or by lot number.
720 ILCS 5/17-30