Provided that no order shall be passed unless the person affected thereby and the Department have been given a reasonable opportunity of being heard.

Lapse of Permission Lapse of 31. Every permission granted under section 28 [or section 29]1 or section 30 shall Permission. remain in force for a period of one year from the date of such grant and thereafter it shall lapse. Provided that such lapse shall not bar any subsequent application for fresh permission under this Act. Provided further that, the Department may, on an application, extend such period from year to year but the total period shall, in no case exceed three years from the date on which the permission was initially granted.