It depends, whatever you wrote in your FPL does not really matter much, as long as you have notified the alternate of being such. Just from writing it into the FPL does not mean they even get a prior notice. As PIC is responsible for appropriate flight planning it may be necessary to get clearance from the alternate before putting it in FPL. Same as for PPR airfields, filing a FPL does mean nothing for PPR, you have to do that manually. Same for alternate - IF you want to avoid being forced to declare emergency in case of diversion, your choice.
Last edited by ChickenHouse; 25th Aug 2016 at 08:07.