Finality of appellate legal interpretation: higher-court explanations bind application and limit selective acceptance of prior decisions. Section 262 requires the appellate court to decide questions of law and deliver reasons for its decision; when a higher court varies or reverses a High Court judgment, effect must be given to that order as prescribed for High Court judgments. The appellate forum has discretion over costs, and Section 262 does not affect other specified procedural provisions. Higher court explanations of legal position are to be treated as having always existed for application, limiting selective acceptance of prior decisions by authorities.