There are lots of Federal drug laws, but also many state laws as well. For California, they start here:

http://www.leginfo.ca.gov/cgi-bin/waisgate?WAISdocID=6817592563+0+0+0&WAISaction=retrieve

You may not want to read them unless you are having trouble sleeping. <img src="/images/graemlins/smirk.gif" alt="" />