Advance ruling clarifies binding decisions on proposed or ongoing supplies issued by the Authority or Appellate Authority. An advance ruling is a decision given to an applicant on specified questions relating to the supply of goods or services proposed or undertaken by the applicant. The framework designates an Authority to decide applications and an Appellate Authority to hear appeals. 'Applicant' includes persons registered or seeking registration, and 'application' is the request made to the Authority under the Act.