Section 72C(a) in Presidency Small Cause Courts Act, 1882
(a)the fact of such settlement is communicated, by a petition signed by the parties or their agents, to the Court before or within twenty-one days after the expiry of the period fixed by the Court or the Registrar for entering appearance, or, in the case of a proceeding under Chapter VII, before or within twenty-one days after the day appointed for showing cause, and