Save as otherwise provided under this Act, no person shall establish or maintain any institution for persons with disabilities except under and in accordance with a certificate of registration issued in this behalf by the competent authority:

Provided that a person maintaining an institution for persons with disabilities immediately before the commencement of this Act may continue to maintain such institution for a period of six months from such commencement and if he has made an application for such certificate under this section within the said period of six months, till the disposal of such application.