Appointment and terms govern selection, remuneration, tenure and removal of Authority chairman and technical member under GST framework. Rule 124 provides that the Chairman and Members are appointed by the Central Government on Selection Committee recommendations; their pay and allowances correspond to equivalent Central Government Group 'A' posts or last drawn pay reduced by pension for retirees. Tenure is two years or until the prescribed retirement age, with eligibility for reappointment and an age threshold for selection; the Central Government, with required approvals, may terminate appointments.