The following is a Teleview - Recommendation for Digital Broadcast Tv Reception.
Here is the Federal Antenna Law that says Yes you can , Install , Use , Maintain , Tv antennas above the roof in such a manner that you will have reliable reception.
There are No Size Restrictions for Tv antennas.
There are No Placement Restrictions , You can not be required to hide the antenna.
You can install the antennas in plain sight.
Hoa's , Housing Coven-nuts , and etc. are well aware of this Federal Antenna Law and they are aware that they Must Comply with the Federal Antenna Law.
http://www.fcc.gov/mb/facts/otard.html