Proper Officer designation assigns state tax officers delegated powers and jurisdictional duties under the OGST framework. The notification designates specified classes of State Tax officers as Proper Officer, assigns particular powers and duties to those ranks with territorial jurisdictions set by the Commissioner, allows higher-ranking officers to exercise subordinate powers within their jurisdiction, restricts Appellate Authorities from exercising other officers' powers, and authorizes delegation by the Commissioner to subordinate officers, superseding the prior office order.