As is true of web sites , web sites can go down and return later.
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Here is the Federal Antenna Law that says Yes you can install a Broadcast Tv Antenna Above The Roof Of Any Size So As To Have Reliable Reception.
Hoa's are well aware of this Federal Antenna Law and some Hoa's keep their mouth shut about it.
And some Hoa's will try and twist the information in the web site and try and use it to stop you from install the antenna above your roof.
http://www.fcc.gov/mb/facts/otard.html.