Ahh.. that rings a bell.. You can use it, but you aren't allowed to use it as a 'Primary source of navigation'..
This reminds me of a debate where they didn't want cross hairs showing aircraft position because pilot's may use it as a primary source of nav. Of course I pointed out that you could just place a cross-hair on the glass of an EFB with a china-graph / pen when you have the map set to display aircraft position in the centre
I'm a convert now.
iPro Aviatior kneepad +
iPad +
Moving Map / Planning Software = EFB.
I wonder what the certification requirements would be for iPad and/or software. Would it be correct that iPad's GPS would need certification, then software using it would be fine?