Provided that the State Transport Appellate Tribunal shall not entertain any application from a person aggrieved by an order of a State Transport Authority or Regional Transport Authority, unless the application is made within thirty days from the date of the order:
Provided further that the State Transport Appellate Tribunal may entertain the application after the expiry of the said period of thirty days, if it is satisfied that the applicant was prevented by good and sufficient cause from making the application in time:
Provided also that the State Transport Appellate Tribunal shall not pass an order under this section prejudicial to any person without giving him a reasonable opportunity of being heard.