Don't get me wrong, as trade associations and federations provide a great service over a broad spectrum of topics.
But the snag is that their range is so broad.
We've just done some work for a client who had a query from their client on certification of materials they supplied.
They were given the run around by their trade federation and in the end came to Strategic Safety Systems who were able to give an answer (that there was no such certification when you are talking about their type of product.)
In specialist areas, talk to the specialists.