Explanation:

Section 19 in The Industrial Disputes Act, 1947
19. Period of operation of settlements
(1) A settlement 1 shall come into operation on such date as is agreed upon by the parties to the dispute, and if no date is agreed upon, on the date on which the memorandum of the settlement is signed by the parties to the dispute.
(2) Such settlement shall be binding for such period as is agreed upon by the parties, and if no such period is agreed upon, for a period of six months from the date on which the memorandum of settlement is signed by the parties to the dispute, and shall continue to be binding on the parties after the expiry of the period aforesaid, until the expiry of two months from the date on which a notice in writing of an intention to terminate the settlement is given by one of the parties to the other party or parties to the settlement.