The State Government shall appoint, an officer to act as Collector under the Act, within ninety days of coming into force of the Wild Life (Protection) Amendment Act, 2002, or within thirty days of the issue of notification under section 18, to inquire into and determine the existence, nature and extent of rights of any person in or over the land comprised within the limits of the sanctuary which may be notified under sub-section (1) of section 18.