Meghalaya GST amendment introduces National Appellate Authority and revised composition, Aadhaar registration, electronic payment and return changes. A National Appellate Authority for Advance Ruling is to be constituted with composition and service conditions aligned to the Central Act; its advance rulings are binding on applicants and registered persons sharing the same Permanent Account Number. A new optional composition scheme allows registered persons with preceding-year turnover up to fifty lakh rupees to opt to pay tax at a prescribed rate not exceeding three per cent, subject to exclusions. Aadhaar-based authentication for registration, mandated electronic payment modes for prescribed classes, revised return filing rules, electronic cash ledger transfer and related central account transfers, and a ten per cent profiteering penalty are also provided.