UCP 600: Uniform Customs and Practice for Documentary Credits - The primary international rules governing the operation of Letters of Credit, published by the International Chamber of Commerce

ISP98: International Standby Practices - Comprehensive rules specifically governing Standby Letters of Credit operations internationally

Singapore Bills of Exchange Act: Chapter 23 of Singapore Laws - Governs negotiable instruments including certain aspects of Letters of Credit in Singapore

Singapore Banking Act: Chapter 19 of Singapore Laws - Provides the regulatory framework for banking business in Singapore, including LC operations

Singapore Contract Law: Fundamental law governing contractual relationships and obligations in Singapore, applicable to LC agreements

Monetary Authority of Singapore Act: Establishes MAS's regulatory authority over financial institutions and their operations, including LC transactions

International Banking Act: Regulates international banking operations in Singapore, relevant for cross-border LC transactions

Electronic Transactions Act: Governs electronic transactions and digital signatures, important for electronic LC processing

MAS Guidelines on Letters of Credit: Specific regulatory guidelines issued by MAS for banks handling Letters of Credit

MAS Notice 643: Regulations governing transactions with related parties, affecting LC issuance to related entities

ABS Guidelines: Association of Banks in Singapore Guidelines providing industry standards for banking practices including LC operations

ICC Rules: International Chamber of Commerce rules providing global standards for trade finance instruments

SWIFT Standards: International messaging standards for LC communication between banks through the SWIFT network