The Authority is established by notification in:

The establishment of any government Authority or body is a formal legal process. The Official Gazette is the designated publication for all official government notifications, including the promulgation of laws, rules, and the establishment of new entities. This ensures public awareness and legal validity.

• Provincial Assembly Records document legislative proceedings, not the final notification of establishment.
• The High Court Registry handles judicial filings and records, unrelated to the executive act of establishing an authority.
• Local Government offices are administrative units and do not serve as the official medium for such high-level government notifications.

Therefore, the Official Gazette is the correct and legally recognized medium for such announcements.