1.4.1 When these Guidelines require that a particular
fitting material, appliance, apparatus, item of equipment or type
thereof should be fitted or carried in an offshore support vessel,
or that any particular provision should be made, or any procedure
or arrangement should be complied with, the Administration may allow
any other fitting, material, appliance, apparatus, item of equipment
or type thereof to be fitted or carried, or any other provision, procedure
or arrangement to be made in that ship, if it is satisfied by trial
thereof or otherwise that such fitting, material, appliance, apparatus,
item of equipment or type thereof or that any particular provision,
procedure or arrangement is at least as effective as that required
by the Guidelines. However, the Administration may not allow operational
methods or procedures to be made an alternative to a particular fitting,
material, appliance, apparatus, item of equipment, or type thereof,
which are prescribed by these Guidelines, unless such substitution
is specifically allowed by these Guidelines.
1.4.2 When the Administration so allows any fitting,
material, appliance, apparatus, item of equipment, or type thereof,
or provision, procedure, or arrangement, or novel design or application
to be substituted thereafter, it should communicate to the Organization
the particulars thereof together with a report on the evidence submitted
so that the Organization may circulate the same to other Contracting
Governments to the 1974 SOLAS Convention, as amended, and Parties
to MARPOL 73/78, for the information of their officers.