Altering the definitions of "junkyard" and "scrap metal processing facility" as those definitions apply to the regulation of those facilities near certain highways in the State; authorizing only scrap metal processing facilities and junkyards, as defined in the Act, to purchase scrap metal by weight across an on-site scale; providing that certain provisions of law governing scrap metal processing facilities and junkyards preempt and supersede any conflicting local law; increasing certain penalties; etc.