Proper officer designation assigns registration and composition functions under the central GST framework to designated officers. Designation of officers as proper officers allocates statutory functions under the Central Goods and Services Tax framework for registration, composition levy and related administrative provisions. The notice specifies that Principal Commissioners/Commissioners, Additional/Joint Commissioners, Deputy/Assistant Commissioners, Superintendents and Inspectors of Central Tax are each assigned defined sections and rules under the Act and Rules to exercise registration, composition-related, verification, assessment and procedural enforcement functions.