New South Wales Consolidated Acts New South Wales Consolidated Acts(cf Model Law Art 4)
A party who knows that any provision of this Act from which the parties may
derogate or any requirement under the arbitration agreement has not been
complied with and yet proceeds with the arbitration without stating the
party's objection to such non-compliance without undue delay or, if a
time-limit is provided for stating the party's objection, within such period
of time, is taken to have waived the party's right to object.