The rocketry hobby has a number of regulations at the federal, state, and local levels that must be met. This site attempts to cover the federal regulations and to a lesser extent state and local at least to the extent that I have experienced them in Arlington, TX.
My original webpages on regulation have grown over time and this is an attempt to provide a little better organization. Some information is no longer here such as all the verbage about the ATF lawsuit. The old version can be found at the Internet Archive.