RE: aerial rocket launching
Just as rkramer said the AMA is not a law making body however if you are a member do take the trouble to read your safety code item #7 and do realize that AMA insurance will not be in place if you do this. Perhap far more important if it is a club field of an AMA chartered club that you intend to use, then the site insurance for the property owner will not be in place and this puts club at risk.
Now concerning legal questions. Citys and countys have laws all over many areas limiting model rocketry some times to very specific areas. So unless you choose such a site then you may or may not be breaking the law.
AMA does allow rocket boost RC gliders with a limit on motor size and a max weight of I think of 3.2 lbs. This is only if the rocket stays with the aircraft and not dropped or launched. Back to law this would not be legal in areas prohibited by municiple or county law.
John