Advance ruling determines tax liability and legal questions for resident and non-resident transactions, including avoidance arrangements. An advance ruling is a determination by the Authority addressing tax consequences of transactions by or affecting resident and non-resident applicants, including questions of law or fact, issues relating to computation of total income pending with tax authorities or appellate bodies, and whether a proposed arrangement constitutes an impermissible avoidance arrangement under Chapter X-A; certain prior rulings to resident applicants retain binding effect by transitional provision.