Section 460.140  Incorporation by Reference and Cutpoint Standards

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 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 February 1999.

(Source:  Amended at 48 Ill. Reg. 16576, effective October 29, 2024)