Prevention of Corruption Act, 1988 — Sections 7, 13(1)(d), 13(2) and 19(1) — Sanction for Prosecution — Statutory Requirement — Section 19(1) mandates prior sanction from the appropriate authority for prosecuting a public servant. B. Criminal Procedure Code, 1973 (CrPC) — Section 465 — Prevention of Corruption Act, 1988 — Section 19(3) — Scope of Review — Courts can review the sanction order for errors, omissions, or irregularities but cannot set aside the conviction unless it is established