Immigration Act (Chapter 133): Primary legislation that controls and regulates immigration matters in Singapore, including requirements for passport handling and collection procedures

Passports Act (Chapter 220): Legislative framework governing the issuance and handling of Singapore passports, including specific requirements for passport collection and authorization processes

Personal Data Protection Act 2012 (PDPA): Legislation regulating the collection, use, and disclosure of personal data, which is relevant for handling personal information in authorization letters

ICA Guidelines: Administrative requirements set by Immigration & Checkpoints Authority for passport collection, including specific documentation requirements for third-party collection

Authorization Documentation Requirements: Specific requirements for proper documentation of authorization, including clear identification of both authorizer and authorized person

Scope and Validity Requirements: Requirements for clearly stating the purpose, scope, and validity period of the authorization in the letter

Supporting Documents Requirement: Requirements for additional documentation such as photocopies of identification documents and potential notarization requirements