They only real rule that the Flag of Britannia breaks is the 2-3 basic colours but it does conform to everyother rule.
The green represents the green fields of the empire's homeland.
The gold represents the untarnishable imperial dyansty.
The gray is the steel resolve of the people of the empire.
The dark red is the blood of those who have given their lives to defend the empire though out the centuries.
The double barred cross has nothing to do with religion but is meant to be destintive enough not to be mistaken in battle.