Goods and Services Tax Council establishes membership, advisory remit, weighted vote supermajority, quorum and dispute mechanism for harmonised GST. Article 279A creates the Goods and Services Tax Council, comprising the Union Finance Minister, the Union Minister of State for Revenue or Finance, and State finance ministers or nominees; States choose a Vice Chairperson. The Council recommends which taxes to subsume, taxable or exempt goods and services, model GST laws, principles of levy, apportionment for inter State supplies, place of supply rules, exemption turnover thresholds, rate structures and special rates, and special State provisions. It must promote a harmonised GST and national market, determine its procedure, meet with a half member quorum, decide by a weighted vote supermajority with Central and State weightings, and establish a dispute resolution mechanism.