Tiles on Balconies

We have found several balconies in our building have stress fractures in the concrete and leak water to the balconies below in rain.  Some of the balconies have been tiled by either past or present owners and some have not.  We have had advice and quotes from concrete experts who advise that tiling the balconies has not contributed to the stress fractures occuring, but to correct the situation the tiles will have to be taken up, water proof membranes put down and then new tiles relaid.  This of course will be fairly expensive.  The balconies with fractures that have not been tiled will of course be much cheaper to waterproof.

My question is:   The waterproofing part of the work is purely the BC’s responsibility but whose responsibility is it to pay for taking up and relaying the tiles?