Here is what I found at the CAL DOT website. The link to the specific page is this one:
http://www.dmv.ca.gov/pubs/vctop/vcp...sions/14_8.pdf
Limitations: Driving Hours
34501.2. (a) The regulations adopted under Section
34501 for vehicles engaged in interstate or intrastate
commerce shall establish hours-of-service regulations for
drivers of those vehicles that are consistent with the hours-ofservice
regulations adopted by the United States Department
of Transportation in Part 395 of Title 49 of the Code of
Federal Regulations, as those regulations now exist or are
hereafter amended.
(b) The regulations adopted under Section 34501 for
vehicles engaged in intrastate commerce that are not
transporting hazardous substances or hazardous waste, as
those terms are defined by regulations in Section 171.8 of
Title 49 of the Code of Federal Regulations, as those
regulations now exist or are hereafter amended, shall have
the following exceptions:
(1) The maximum driving time within a work period shall
be 12 hours for a driver of a truck or truck tractor, except for
a driver of a tank vehicle with a capacity of more than 500
gallons transporting flammable liquid, who shall not drive for
more than 10 hours within a work period.
(2) No motor carrier shall permit or require a driver to
drive, nor shall any driver drive, for any period after having
been on duty for 80 hours in any consecutive eight days.
(3) A driver employed by an electrical corporation, as
defined in Section 218 of the Public Utilities Code, a gas
corporation, as defined in Section 222 of that code, a
telephone corporation, as defined in Section 234 of that code,
a water corporation, as defined in Section 241 of that code, or
a public water district as defined in Section 20200 of the
Water Code, may be permitted or required to drive more than
Div. 14.8 —559— §34501.5
the number of hours specified in subdivision (a) while
operating a public utility or public water district vehicle
during the emergency restoration of service.
(4) Any other exceptions applicable to drivers assigned to
governmental fire suppression and prevention, as
determined by the department.
(5) A driver employed by a law enforcement agency, as
defined in Section 390.3(f)(2) of Title 49 of the Code of Federal
Regulations, as that section now exists or is hereafter
amended, during an emergency or to restore the public peace.
(c) The regulations adopted under Section 34501 for
vehicles engaged in the transportation of farm products in
intrastate commerce shall include all of the following
provisions:
(1) A driver employed by an agricultural carrier, including
a carrier holding a seasonal permit, or by a private carrier,
when transporting farm products from the field to the first
point of processing or packing, shall not drive for any period
after having been on duty 16 hours or more following eight
consecutive hours off duty and shall not drive for any period
after having been on duty for 112 hours in any consecutive
eight-day period, except that a driver transporting special
situation farm products from the field to the first point of
processing or packing, or transporting livestock from pasture
to pasture, may be permitted, during one period of not more
than 28 consecutive days or a combination of two periods
totaling not more than 28 days in a calendar year, to drive for
not more than 12 hours during any workday of not more than
16 hours. A driver who thereby exceeds the driving time
limits specified in paragraph (2) of subdivision (b) shall
maintain a driver’s record of duty status, and shall keep a
duplicate copy in his or her possession when driving a vehicle
subject to this chapter. These records shall be presented
immediately upon request by any authorized employee of the
department, or any police officer or deputy sheriff.
(2) Upon the request of the Director of Food and
Agriculture, the commissioner may, for good cause,
temporarily waive the maximum on-duty time limits
applicable to any eight-day period when an emergency exists
due to inclement weather, natural disaster, or an adverse
economic condition that threatens to disrupt the orderly
movement of farm products during harvest for the duration of
the emergency. For purposes of this paragraph, an emergency
does not include a strike or labor dispute.
(3) For purposes of this subdivision, the following terms
have the following meanings:
(A) “Farm products” means every agricultural,
horticultural, viticultural, or vegetable product of the soil,
honey and beeswax, oilseeds, poultry, livestock, milk, or
timber.
(B) “First point of processing or packing” means a location
where farm products are dried, canned, extracted, fermented,
distilled, frozen, ginned, eviscerated, pasteurized, packed,
packaged, bottled, conditioned, or otherwise manufactured,
processed, or preserved for distribution in wholesale or retail
markets.
Hope things gives you some help...for what you want to know.
