the safe option is to copy the correspondence on which you rely to the insurance company and ask them if they are satisfied that the practise you propose will not invalidate your policy - if they agree it will not (in writing) all will be well.
I agree, but I have found - on these standard aviation law sleeping dogs - that the insurance co. simply says "you must comply with the legal requirements" and that's it.
This way, they reserve the right to pay out or not according to their lawyers' advice when you actually crash. They don't want to spend money on lawyers answering your questions
before you crash
But I tend to agree that simply making a full disclosure puts the ball substantially in their court.