Originally Posted by BEagle
Which is why I asked our alleged regulator to get off its complacent backside and answer the damn question!
If you are talking about the CAA, it seems to me that they've answered your question. They can advise you on interpretation of aviation-related legislation but why should they expend resources looking up regulations - on your behalf - set by other agencies? It's your responsibility as the operator (of both aircraft and phone) to ensure that you comply with all relevant regulations.
As Whopity points out - ignorance tends to be a fairly fallible defence in the eyes of the law.