Are there any of the small dishes - any where - on the outside??
For a balcony that is part of your unit and is under your direct control and is not used by any one else , you can install a antenna on the balcony.
What directions are your balconies??
Here is the Federal Antenna Law that provides rights for condo owners.
The Federal Antenna Law - over rules<->is stronger then , hoa's , housing coven-nuts , and ect..
Is written to provide you with - legal rights - .
http://www.fcc.gov/mb/facts/otard.html