The Arbitration and Conciliation Act, 1996
4. Waiver of right to object.
A party who knows that-
a. any provision of this Part from which the parties may derogate. or
b. any requirement under the arbitration agreement. Has not been-complied with and yet proceeds with the arbitration without stating his objection to such non-compliance without undue delay or, if a time limit is provided for slating that objection, within that period of time, shall be deemed to have waived his right to so object.