Coverage may be limited &/or Different during any restriction fly off period
This is a restriction put in place by the underwriter (not the broker) and pertains to the 24-40 hour period required for test phase before restrictions are removed.
I also asked about the 5 hour test period after a major modification is made - the response was that any kind of restriction or requirement to conduct test flights fell under the same caveat.
What the coverage limitations involved was no passenger liability and a 10% increase in deductibles during that period.
Just thought I would mention it - your insurer may of course have different rules.
Ed