Section 20B(1) in West Bengal Industrial Disputes Rules, 1958
(1)The Industrial Tribunal/Labour Court shall on the date fixed in the summons for the appearance of the parties direct the party which appears to the Tribunal/Labour Court to be the party at whose instance the reference has been initiated or where no such party can be ascertained, the party, which, in the opinion of the Industrial Tribunal/Labour Court, ought to be required to state its case first (hereinafter referred to as the first party) to state its case together with the grounds upon which the claim for relief is founded, and a list of relevant documents which are in their possession and upon which they want to rely in writing on a date fixed by the Industrial Tribunal/Labour Court which shall ordinarily be within two weeks from the date of the order.