No order passed by the Board or the Adjudicating Officer under this Act shall be appealable except as provided in section 15T or section 20 and no civil court shall have jurisdiction in respect of any matter which the Board or the Adjudicating Officer is empowered by, or under, this Act to pass any order and no injunction shall be granted by any court or other authority in respect of any action taken or to be taken in pursuance of any order passed by the Board or the Adjudicating Officer by, or under, this Act.