Electronic Transactions Act (ETA): Primary legislation governing electronic contracts and transactions in Singapore. Ensures legal recognition of electronic signatures and establishes validity of electronic contracts.

Personal Data Protection Act (PDPA): Key privacy legislation that regulates the collection, use, and disclosure of personal data. Includes requirements for user consent, data protection obligations, and cross-border data transfer requirements.

Consumer Protection (Fair Trading) Act (CPFTA): Protects consumers against unfair practices, ensures fair contract terms, and regulates misleading claims and representations in business transactions.

Unfair Contract Terms Act (UCTA): Regulates and restricts businesses' ability to limit liability through contract terms. Controls exclusion clauses and ensures reasonableness in contract terms.

Computer Misuse Act: Relevant for cybersecurity provisions in terms of service, addressing unauthorized access and system interference concerns.

Competition Act: Ensures terms of service don't create unfair market advantages and prevents anti-competitive practices in business operations.

ASEAN Framework on Personal Data Protection: Regional framework providing guidelines for personal data protection within ASEAN countries, relevant for cross-border service provision.

Singapore Code of Advertising Practice: Guidelines governing advertising and marketing practices, relevant for service promotion and representation in terms of service.