The rules are actually remarkably complete and precise. They may not say it 2 or 3 times, but pretty much everything is covered, if you just take the time to look.
(Not picking on the OP-- a lot of the questions I'm seeing are stuff that is 'in there.')
I think what you're seeing is some extremely poorly worded instructions causing confusion. In this case I think the instructions are clear, but it's not helpful to tell people it's in the rules when they have a question for clarification.