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TRU/Reefer Program Page

Regulation Applies To:
  • - In-use diesel-fueled Transport Refrigeration Units (TRUs) and TRU generator sets that operate in California, whether they are registered in or outside the State.

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  • - TRUs (reefers) and TRU generator sets that operate at all within California are required to meet in-use performance standards by the end of the seventh year after the engine model year or the unit manufacture year.
  • - California-based reefers are required to register with ARB within 30 days of entering a carrier’s control.
  • - California terminal operators that operate TRUs are also required to provide updates within 30 days of changes to any information in Operator Reports.

Upcoming Deadlines:


December 31, 2018 December 31, 2018
  • All 2011 engine models must meet Ultra-Low-Emissions TRU standard.
  • All 2004 engine models of greater than 24 horsepower must now meet Ultra-Low-Emissions TRU standard.
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