Illinois Administrative Code
Title 92 - TRANSPORTATION
Part 460 - DIESEL EMISSION INSPECTION PROGRAM
Subpart A - GENERAL
Section 460.140 - Incorporation by Reference and Cutpoint Standards
Current through Register Vol. 48, No. 38, September 20, 2024
The following materials are incorporated by reference as of the edition date provided below. No later amendments to or editions of the following documents are incorporated. Copies of these materials are available for inspection at the Department's Commercial Vehicle Safety Section at the address provided in Section 460.130.
a) Society of Automotive Engineers (SAE) Recommended Practice J1667 "Snap-Acceleration Smoke Test Procedure for Heavy-Duty Diesel-Powered Vehicles," revised February 1996.
The opacity cutpoints recommended by this guidance that will be used as a standard for this program shall not exceed: 40% opacity for vehicles model year 1991 and newer; 55% opacity for vehicles model year 1974 to 1990; Until December 31, 2002, 70% for vehicles model year 1973 and older; and After January 1, 2003, 55% for vehicles model year 1973 and older.
b) United States Environmental Protection Agency (USEPA) "Guidance to States on Smoke Opacity Cutpoints to be used with the SAE J1667 In-Use Smoke Test Procedure," issued April 1997.
