815 ILCS 325/4.4: Purchase of a catalytic converter or its contents.

(a) It is unlawful for any person to purchase or otherwise acquire a used, detached catalytic converter or any nonferrous part thereof unless all of the following apply:

(1) the person is a licensed recyclable metal dealer;

(2) the sale or purchase occurs at the fixed business address of a licensed recyclable metal dealer that is a party to the transaction; and

(3) the purchaser has maintained the information required under Section 3 of the Recyclable Metal Purchase Registration Law.

(b) A recyclable metal dealer shall not pay cash in payment for any catalytic converter or its contents having a value of $100 or more.