Wis. Admin. Code § Trans 131.05
(1) Purpose. When a vehicle owner or lessee requests a waiver of compliance from emission inspection standards, the emission equipment shall be inspected by the waiver investigator. This waiver emission equipment inspection is designed to detect either tampering or disrepair on the vehicle. The waiver emission equipment inspection does not include removal or disassembly of parts except for removal of the fuel cap. The waiver investigator shall determine both the presence and proper connection, if originally equipped, of the following:
History: Cr. Register, June, 1993, No. 450, eff. 7-1-93; emerg. am. (1) to (3), cr. (1) (i) and (j), eff. 12-4-95; am. (1), (2), (3), cr. (1) (i), (j), Register, April, 1996, No. 484, eff. 5-1-96; am. (1) (j), Register, May, 2001, No. 545, eff. 6-1-01; CR 07-114: r. (2), am. (3) Register June 2008 No. 630, eff. 7-1-08; CR 10-088: am. (1) (intro.) and (j) and (3) Register December 2010 No. 660, eff. 1-1-11.