View from paradise

i live in a 6 unit block close to a harbour. My unit does not have an uninterrupted view of the water, unlike the three front units. ( the block is an L shape with 3 front units and 3 at the rear.My view or rather potential view of water and harbour glimpses is about 14 degrees, two thirds of which are through one of the front units balcony. No problem so far except the owners of this balcony has positioned 2 bushy trees in our line of sight on their balcony, effectively restricting our view to one third of its potential.

My problem is that, despite requests to position the bushes elsewhere on their balcony in the interests of neighbourly harmony, the owners refuse.

I would appreciate any advice regarding whether it is a legitimate approach to call a meeting to pass a bylaw stating that any plants above a certain height on a balcony that impede the enjoyment of another owners view, must be repositioned or trimmed. 

Also does such a bylaw have any legitimacy when considered in Strata legislation or at a tribunal?