¹[10A. Notwithstanding anything contained in this Ordinance, all acts and things done, all actions taken, all appointments made, all notifications issued, all powers exercised and all duties performed, or purported to have been done, taken, made, issued, exercised or performed under this Ordinance on or after the 19th June, 1986 shall be deemed to have been lawfully done, taken, made, issued, exercised or performed, as the case may be, and shall not be called in question in or before any Court, tribunal or authority on any ground whatsoever.]