This page last reviewed December 10, 2008.

The Regulation for the Verification Procedure for In-Use Strategies to Control Emissions from Diesel Engines was created and adopted by our Board on May 16, 2002. The goal of the Verification Procedure is to ensure real emission reductions, along with an emission control system that is durable and compatible with various engines and applications. Within this process, it is the responsibility of the diesel emission control strategies manufacturer to provide data to verify emission reduction claims.

Public Notice to Discuss Proposed Amendments to the Verification Procedure

As of January 1, 2009, all verified diesel retrofits sold and installed must comply with the 2009 nitrogen dioxide (NO2) emissions limit as defined in the Verification Procedure, Warranty and In-Use Compliance Requirements for In-Use Strategies to Control Emissions from Diesel Engines (the Procedure), title 13, California Code of Regulations, sections 2700-2710.  More information, including the conditional grace period for installation, can be found in Mail-Out #MSC 08-26.

The Air Resources Board will hold a public hearing January 24, 2008 and consider the proposed amendments to the Verification Procedure, Warranty and In-Use Compliance Requirements for In-Use Strategies to Control Emissions from Diesel Engines.  The proposed amendments include, but are not restricted to, conditional extensions for certain diesel emission control strategies (DECS), new transient testing requirements for DECS for off-road applications, and new requirements for DECS that control oxides of nitrogen.  The public hearing notice and Initial Statement of Reasons are located at the following link:
www.arb.ca.gov/regact/2008/verdev2008/verdev2008.htm

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