I think you should look into how condo's are actually run. Property managers are hired by the condo association, that in turn is made up od the owners, each unit having a vote. That is the decision making process. So if you want to know what happened to that proposal for sprinklers it will be in the minutes of the association meetings. These in turn are available publicly and are turned over to any potential buyer to read in order to see how well the building is run. You should be asking owners if they ever heard of the proposal from the association.