Roy Lewallen wrote:
Assuming you're in the U.S., you need a copy of Part 15 of the FCC
rules, which deals with unlicensed transmitters among other things. I
imagine it's on the web these days -- if not, it's available from the
government printing office for a nominal charge.

http://wireless.fcc.gov/rules.html (which has links to all Parts of the
FCC rules.)
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com