(5) A fixed step up to 3 inches deep at
the front of an existing automobile
transporter until April 29, 2005. It will
be the responsibility of the operator of
the unit to prove that the step existed
prior to April 29, 2002. Such proof can
be in the form of a work order for
equipment modification, a receipt for
purchase and installation of the piece,
or any similar type of documentation.
However, after April 29, 2005, the step
shall no longer be excluded from a vehicle’s
length.
(c) Each exclusion allowance is specific
and may not be combined with
other excluded devices.
(d) Measurements are to be made
from a point on one side or end of a
commercial motor vehicle to the same
point on the opposite side or end of the
vehicle.
http://edocket.access.gpo.gov/cfr_20...3cfr658.13.pdf