FoxHunter you are wrong. Maybe that's the way you did at your previous airline but many US airlines have been granted relief on this 10% so that there is no need to carry fuel for that period which might be over domestic airspace. Usually the 10% is limited to the time spent in Class ll airspace but ther may be other considerations.
Thanks to all for your contributions to this question. The mods removed it and for the life of me I could not find it until just today. Sure would be nice if when they move my cheese they would give me a hint where to look.