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onrdiesel -- Truck and Bus Regulation Reporting Date Postponed Until April 29, 2011 for agricultural fleets and fleets with street sweepers with Tier

Posted: 21 Mar 2011 13:09:07
The March 31, 2011 reporting date for agricultural fleets and
fleets with street sweepers with Tier 0 auxiliary engines is
being postponed until April 29, 2011 to give fleets more time to
The date that agricultural fleets have to report January 1, 2011
odometer readings for limited use agricultural trucks or
information about specialty agricultural trucks to be eligible
for the agricultural vehicle extensions has been extended to
April 29, 2011.  In addition, the date that fleets with street
sweepers must report hour meter readings for the Tier 0 auxiliary
engines has been extended to April 29, 2011.  California Air
Resources Board staff is preparing an advisory to reflect the
change and will be updating related documents in the near

All other fleets do not have to begin reporting until next year. 
Fleets that plan to use the phase-in option, want to take
advantage of credits, or to use other provisions in the Truck and
Bus regulation, would need to report by January 31, 2012.

Because the amendments considered by the Board in December 2010
will not become effective for at least several months, the delay
in the deadline is being changed administratively pending
approval by the Office of Administrative Law.  

Additional information about the regulation is at:


On December 11, 2008, the Board approved for adoption the Truck
and Bus regulation to control emissions from nearly all existing
diesel powered heavy-duty trucks and buses operating in
California.  The regulation became effective under California law
on January 8, 2010. The regulation applies to diesel fueled
trucks and buses with a gross vehicle weight rating (GVWR)
greater than 14,000 pounds that are privately owned, federally
owned, and to publicly and privately owned school buses.  Local
and state government owned diesel fueled trucks and buses are
already subject to other ARB regulations. Reducing emissions from
in-use trucks and buses is necessary to meet federally imposed
clean air standards and to reduce the adverse health effects from
truck and bus pollution.

On December 17, 2010, the staff recommended amendments, which are
presently pending adoption, that would delay the initial
requirement to install particulate matter (PM) retrofit filters
by one year to January 1, 2012 and extend the time before a
vehicle equipped with a PM filter would have to have an engine
that meets 2010 model year emission standards.  The amendments
would also defer engine replacements for vehicles without PM
filters two years until January 1, 2015.  Prior to 2020,
replacements would be limited to 20 year old or older trucks that
are not equipped with PM filters.  By January 1, 2023, most
vehicles would still need to be equipped with an engine meeting
2010 model year emission standards.

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