11A. Powers of Labour Courts, Tribunals and National Tribunals to give appropriate relief in case of discharge or dismissal of workmen.- Where an industrial dispute relating to the discharge or dismissal of a workman has been referred to a Labour Court, Tribunal or National Tribunal for adjudication and, in the course of the adjudication proceedings, the Labour Court, Tribunal or National Tribunal, as the case may be, is satisfied that the order of discharge or dismissal was not justified, it may, by its award, set aside the order of discharge or dismissal and direct reinstatement of the workman on such terms and conditions, if any, as it thinks fit, or give such other relief to the workman including the award of any lesser punishment in lieu of discharge or dismissal as the circumstances of the case may require Provided that in any proceeding under this section the Labour Court, Tribunal or National Tribunal, as the case may be, shall rely only on the materials on record and shall not take any fresh evidence in relation to the matter.