It depends on which pipe is actually leaking. Aventura’s towers were built in distinct waves, from Turnberry Isle’s twin towers in 1979 and 1980 to Williams Island’s high-rises in the late 1990s, and like almost every condo tower of that design, each one runs a shared vertical riser down through the building with individual units branching off it. A leak inside your own unit’s branch is typically yours; a leak in the shared riser or main stack is usually the association’s.
Age matters here too. Florida now requires older high-rises to go through a mandatory structural and life-safety milestone inspection, and buildings that reach that point routinely turn up aging risers and shared stacks alongside the structural items, which is one reason a plumbing problem in an Aventura tower is rarely just about one unit.