Appeal rights specify appellate forum, local venue rules, and limited-time filing with discretionary extension. Section 21 sets an appeal framework: aggrieved persons may appeal orders to prescribed appellate courts depending on the issuing authority, within a specified period with a discretionary extension for sufficient cause. Organizations and affected persons may appeal refusals or related orders to the High Court within relevant local limits tied to residence, business, employment, or principal office. Appeals are deemed appeals from an original decree and, as far as practicable, Order XLI of the First Schedule to the Code of Civil Procedure applies.