Because of the upcoming tournament and the increase of players, I feel that it is important to get an FAQ for the tournament.
The FAQ on the GW website will be the final ruling. However if a rule is not covered by the FAQ, CAG will make a ruling here that will be in effect for the tournament.
Ask your question in the main section of 40K Rules questions as normal. Once I and a crack team of rules lawyers take a look over it I'll make a final ruling and place it in this thread. Feel free to offer suggestions to the rulings in the individual thread pertaining to the rule, but it does not mean that it will be taken. A copy of the FAQ will be available to all on the day of the tournament.