Originally Posted by murtnabila

27156. (a) No person shall operate or leave standing upon any
highway any motor vehicle which is a gross polluter, as defined in
Section 39032.5 of the Health and Safety Code.
(b) No person shall operate or leave standing upon any highway any
motor vehicle which is required to be equipped with a motor vehicle
pollution control device under Part 5 (commencing with Section 43000)
of Division 26 of the Health and Safety Code or any other certified
motor vehicle pollution control device required by any other state
law or any rule or regulation adopted pursuant to that law, or
required to be equipped with a motor vehicle pollution control device
pursuant to the National Emission Standards Act (42 U.S.C. Secs.
1857f-1 to 1857f-7, inclusive) and the standards and regulations
adopted pursuant to that federal act, unless the motor vehicle is
equipped with the required motor vehicle pollution control device
which is correctly installed and in operating condition. No person
shall disconnect, modify, or alter any such required device.
(c) No person shall install, sell, offer for sale, or advertise
any device, apparatus, or mechanism intended for use with, or as a
part of, any required motor vehicle pollution control device or
system which alters or modifies the original design or performance of
any such motor vehicle pollution control device or system.
(d) If the court finds that a person has willfully violated this
section, the court shall impose the maximum fine that may be imposed
in the case, and no part of the fine may be suspended.
(e) "Willfully," as used in this section, has the same meaning as
the meaning of that word prescribed in Section 7 of the Penal Code.
(f) No person shall operate a vehicle after notice by a traffic
officer that the vehicle is not equipped with the required certified
motor vehicle pollution control device correctly installed in
operating condition, except as may be necessary to return the vehicle
to the residence or place of business of the owner or driver or to a
garage, until the vehicle has been properly equipped with such a
device.
(g) The notice to appear issued or complaint filed for a violation
of this section shall require that the person to whom the notice to
appear is issued or against whom the complaint is filed produce proof
of correction pursuant to Section 40150 or proof of exemption
pursuant to Section 4000.1 or 4000.2.
(h) This section shall not apply to an alteration, modification,
or modifying device, apparatus, or mechanism found by resolution of
the State Air Resources Board to do either of the following:
(1) Not to reduce the effectiveness of any required motor vehicle
pollution control device.
(2) To result in emissions from any such modified or altered
vehicle which are at levels which comply with existing state or
federal standards for that model year of the vehicle being modified
or converted.
(i) This section applies to motor vehicles of the United States or
its agencies, to the extent authorized by federal law.

27156.1. The installation, prior to January 1, 1974, of an
auxiliary gasoline fuel tank for use on a 1973 or earlier model year
motor vehicle, which vehicle is required, pursuant to Part 5
(commencing with Section 43000) of Division 26 of the Health and
Safety Code or the National Emission Standards Act (42 U.S.C., Secs.
1857f-1 to 1857f-7, inclusive), to be equipped with a fuel system
evaporative loss control device, shall not be deemed a violation of
Section 27156 of this code. As used in this section, the term
"auxiliary gasoline fuel tank," has the same meaning as defined in
subdivision (b) of Section 43834 of the Health and Safety Code.


27156.2. Notwithstanding any other provision of law, any publicly
owned authorized emergency vehicle operated by a peace officer, as
defined in Section 830 of the Penal Code, any authorized emergency
vehicle, as defined in Section 165 and used for fighting fires or
responding to emergency fire calls pursuant to paragraph (2) of
subdivision (b) or pursuant to subdivision (c) or (d) of that
section, and any publicly owned authorized emergency vehicle used by
an emergency medical technician-paramedic, as defined in Section
1797.84 of the Health and Safety Code, is exempt from requirements
imposed pursuant to California law and the regulations adopted
pursuant thereto for motor vehicle pollution control devices.


27156.3. Notwithstanding any other provision of law, any motor
vehicle of mosquito abatement, vector control, or pest abatement
districts or agencies, any authorized emergency vehicle as defined in
Section 165, except subdivision (f) thereof, and any ambulance used
by a private entity under contract with a public agency, is exempt
from requirements imposed pursuant to California law and the
regulations adopted pursuant thereto for motor vehicle pollution
control devices.