Condominium Ancillary Cost Dispute: Challenge to Administrator's Expert Opinion Timeliness

The case concerned an appeal regarding the right to challenge an expert opinion established within a court-approved settlement concerning the approval of ancillary cost statements for a condominium association, where the parties agreed that the administrator would control the accounts, obligating the plaintiff to pay based on this control, while allowing the association to judicially claim costs not considered by the administrator. The court confirmed the lower court's finding that the administrator's control constituted a binding expert opinion, noting that while the association was not bound and could sue for rejected costs, the plaintiff did retain the right to challenge the expert opinion for severe defects like evident injustice or arbitrariness. However, the court ultimately ruled that the plaintiff's challenge, initiated over three months after receiving the expert opinion, was time-barred because such challenges require immediate action or action within a short, reasonable period to ensure legal certainty, thus binding the plaintiff to the result of the expert opinion.