Our neighbour has a swimming pool. The dividing (boundary) fence between our backyards is part of the fence around their swimming pool and is only 1.6m high. We had friends over and they pointed out to us that boundary fences should be at least 2.4m high as it is part of the fence around our neighbours' swimming pool. They have barriers on 3 sides of the pool, but there is no barrier between the pool and our boundary fence. Our friends told us that the fence is not compliant with the rules. We do not know the neighbours as they live in the street behind us. The neighbours' swimming pool has been built since around 1997 and the boundary fence has never been changed or updated. Some of the fence palings are falling apart too and the pool can be clearly seen in the gaps, hence we can see there is no barrier between the pool and the boundary fence. We also have other visitors who have young children and we are obviously very concerned about this. We live in the Knox area in Melbourne. What can we do about it please?