Section 10B(11) in Industrial Disputes (Central) Rules, 1957
(11)In respect of a reference under section 2-A, the Labour Court, Tribunal or National Tribunal, as the case may be, shall ordinarily submit its awards within a period of three months: Provided that the Labour Court, Tribunal or National Tribunal may, as and when necessary, extend the period of three months and shall record its reasons in writing to extend the time for submission of the award for another specified period. ]