Proper officer designation assigns registration and composition functions to designated tax officers under GST rules. The Board assigns proper officer functions for registration and composition matters: the Assistant or Deputy Commissioner of Central Tax is responsible for specified provisions including sub section (5) of section 10, the proviso to sub section (1) of section 27, section 30 and Rules 6, 23 and 25; the Superintendent of Central Tax is assigned duties under sub section (8) of section 25, sections 28 and 29, and Rules 9, 10, 12, 16, 17, 19, 22 and 24. Trade associations are asked to publicise these designations.