The ruling about the 52 weeks is indeed correct and is in fact a selling point for BAE systems when recruiting for Saudi I would dread to think that there is one rule for Military Personnel and a nother for Civilians(but would not of course be surprised) which surely highlights a discrimination issue.The situation regarding council tax must surely be the same I am assuming that You have a house in a certain area and in which You certainly have to pay the said tax however it would most certainly be reduced if You are living abroad but using Your house as a main residence whilst in the UK and indeed is Your intended Family home when You return.To be honest i would contact the relevent People within the DSS and indeed the local council office where Your home is located.