Exclusive usage rights

Recently the owners corporation of my building decided to reclaim an area that I have exclusive usage to. I engaged my solicitor who came to an AGM and told them they had no legal rights to it as it was indeed exclusive usage entitlement to the owner of that lot. They voted at that time to get their own advice and unfortunately for them came up with the same result. I have asked the owners corporation for a copy of their solicitors advice and was informed by the chairman that the OC can withhold information that may compromise its legal position. He said he would have to put it to the EC to see if they would release the information. If they choose not to, do I have any legal grounds for accessing their advice?