Goods and Services Tax Act: Singapore's primary legislation governing GST requirements for invoices, including GST registration numbers and tax calculations
Revenue Law: Covers taxation aspects of international invoices and related financial transactions in Singapore
Contract Law: Governs the formation and enforcement of contracts in Singapore, including invoicing terms and conditions
Electronic Transactions Act: Regulates electronic transactions and digital signatures, relevant for e-invoicing compliance
Currency Act: Governs currency usage and denomination requirements in Singapore financial documents
Customs Act: Regulates import/export procedures and related documentation requirements for international trade
Regulation of Imports and Exports Act: Controls the import and export of goods and related documentation requirements
UN Convention on Contracts for International Sale of Goods: International convention governing contracts for cross-border sale of goods
GST Requirements: Specific requirements for GST registration numbers, calculations, and declarations on invoices
AML/CTF Requirements: Documentation requirements under Money Laundering and Terrorism Financing Prevention rules
IRAS Invoice Requirements: Specific invoicing requirements set by the Inland Revenue Authority of Singapore
Invoice Content Requirements: Mandatory elements including invoice number, date, business details, customer information, descriptions, currency, payment terms, and bank details
