The California Air Resources Board (ARB) has issued TRU Advisory 09-17 explaining the compliance requirements for transport refrigeration units (TRU) based outside California that operate in that state.

TRU Airborne Toxic Control Measure (ATCM) advisories are listed at

The direct link to TRU Advisory 09-17 is

Additional compliance assistance materials may be found at

The toll-free TRU Help Line is at: 1-888-878-2826.