Any mental health establishment aggrieved by an order of the Authority refusing to grant registration or renewal of registration or cancellation of registration, may, within a period of thirty days from such order, prefer an appeal to the High Court in the State:
     Provided that the High Court may entertain an appeal after the expiry of the said period of thirty days, if it is satisfied that the appellant had sufficient cause for not preferring the appeal within the period of thirty days.