It is agreed that in Section 1, Material Damage the following is added to Conditions to Section 1:
(a) Insurers will not indemnify the Insured for loss or damage directly or indirectly caused by rain, inundation or flood to pipes, conduits and cables laid in trenches where any of the following requirements have not been fulfilled:
(i) as soon as practicable, pipes or conduits have been secured against displacement and trench has been backfilled;
(ii) the open ends of pipes and conduits are provisionally plugged to guard against the ingress of water, mud and detritus during any interruption of laying operations and in the event of imminent danger from flooding.
(b) In respect of Loss to open trenches and pipes, conduits or cables laid therein, caused directly or indirectly by rain, inundation or flood, Insurers liability shall be limited in respect of the aggregate length of open trenches at any one time as stated below.
Should the length of all open trenches at the time of the Loss be in excess of the aggregate length limit stated below then the indemnity shall be reduced by the percentage which that limit bears to the total length of all open trenches at the time of the Loss.
Open trench shall mean a partially or totally excavated trench, including a trench in which a pipe, conduit or cable has been laid but not fully backfilled to the level of the adjoining ground and finally compacted.
Aggregate length limit of open trenches: ……………………………… metres.