Mizoram GST Rules set composition levy procedures, eligibility conditions, tax rates and comprehensive registration and withdrawal mechanisms. The rules prescribe electronic intimation, stock declaration and statement filing requirements for the composition levy, set eligibility conditions and display/invoicing obligations, and fix composition tax rates for specified categories. They define procedures for withdrawal or denial of composition status with notice, reply and order forms, and establish comprehensive registration, verification, amendment, cancellation, migration and authentication processes on the common portal using the FORM GST REG and related series.