Here is the Federal Law that says Yes you can install and use a outside roof top antenna. This Federal Law over rides All , hoa's , housing covenets , citys , counties , states , and any other crazies that do not like antennas. Hoa's are well aware of this Federal Law , yet still try to scam people. Show this Federal Law to the hoa they will back off. This is 'Settled Law' it has been challanged time after time in court and the hoa's and all the other crazies have lost time after time in court.
http://www.fcc.gov/mb/facts/otard.html