Officer misconduct by customs officers triggers criminal liability and fines for collusion, unlawful searches, arrests, or disclosure. Section 136 establishes three categories of offending conduct by customs officers: collusion or connivance enabling fraudulent export or evasion of duties or prohibitions; requiring searches, effecting arrests, or authorising searches without reasonable belief that goods or related documents are secreted; and unauthorised disclosure of particulars learned in official capacity except when acting in good faith or under lawful requisition. Each category is punishable by criminal sanctions and fines.