At the public hearing on December 7, 2006, the Air Resources Board adopted emergency revisions to accept "resident" Tier 1 and Tier 2 engines that do not meet the current emission standard in effect at the time of registration. PERP is currently accepting applications for all Tier 1 engines and also Tier 2 engines rated between 175 BHP and 750 BHP if documentation of operating in California at any time between March 1, 2004, and October 1, 2006, is submitted with the application. Documentation can include company equipment inventory, purchase records, usage records, or maintenance records. Form 2A must be submitted with the residency documentation.

These Tier 1 and Tier 2 engines that do not meet the current emission standard must also pay an increased fee for registration that includes back registration fees, back inspection fees, and current registration fees. The amount of the fee will be based on year of purchase, year of manufacture, or Tier 2 start date, depending on certain criteria. Click here to see the Tier 1 and Tier 2 fee tables and examples of each.