2 snap questions (NF)

[PSU213]

NF Rules--

Hello all. I have 2 questions about the snap, ready for play, etc.

(1) Is it illegal to snap the ball before the ready for play? I wanted to think that it was, but I could not find it in the rules. (NF references, if applicable, are apprecitated)

(2) A 1/10 at their own 20. Before the ready for play, A's snapper goes up and rotates the ball end to end. Is this illegal if he does this before the RFP? Also, if this is a foul, would it be 1/10 or 1/15 since the RFP was not blown?

Thanks for all the responses.