1.11.1 Where this Code requires that a particular
fitting, material, appliance or apparatus, or type thereof, shall
be fitted or carried in a craft, or that any particular provision
shall be made, the Administration may allow any other fitting, material,
appliance or apparatus, or type thereof, to be fitted or carried,
or any other provision to be made in the craft, if it is satisfied
by trial thereof or otherwise that such fitting, material, appliance
or apparatus, or type thereof, or provision, is at least as effective
as that required by this Code.
1.11.2 Where compliance with any of the requirements
of this Code would be impractical for the particular designs of the
craft, the Administration may substitute those with alternative requirements
provided that equivalent safety is achieved. The Administration which
allows any such substitution shall communicate to the Organization
particulars of these substitutions and the reasons therefor, which
the Organization shall circulate to its Member Governments for their
information.