Unless there is something I am unaware of in NSW legislation specifying a separate resolution for funding legal action, I can’t see why the up-coming AGM could not include a proposed Admin Fund budget for the coming year (as it always would) that includes a line for legal expenses with a sufficient amount to pay the managing agent for their services representing the OC at the Tribunal. If anyone objects, you can explain that the OC is obliged to pay since it has already received those services (and won). The lot owners who lost might vote against the motion but I assume they are a small minority so it would not matter.