At the time of purchase by any junk dealer of any copper wire, pig, or pigs of metal or of any junk, as specified in section 3-4-1 of this chapter, he shall obtain a signed and dated statement from the person or persons selling it as to when, where and from whom the property was obtained, and also the residence, address and place of employment of the seller or sellers. The statement shall be retained for five (5) years by the junk dealer and shall be subject to the provisions of section 3-4-3 of this chapter relating to erasure, mutilation or change, and also to inspection. (1991 Code § 5.20.050, as amended)