Appeal definition expanded under amended rules to include statutory and rule-based routes, clarifying scope for securities appeals. The amendment substitutes clause (b) of rule 2 to define 'appeal' as an appeal filed under section 21A, section 22A or section 23L of the Securities Contracts (Regulation) Act, 1956 or under sub-rule (5) of rule 19 or sub-rule (5) of rule 20 of the Securities Contracts (Regulation) Rules, 1957; the rules take effect on publication in the Official Gazette and are made under the powers conferred by section 30 of the Act.