Contracts Act (Cap. 53): Primary legislation governing the formation and enforcement of contracts in Singapore, including fundamental principles of contract law such as offer, acceptance, consideration, and contractual obligations

Electronic Transactions Act: Legislation governing electronic contracts and digital signatures, providing legal recognition and framework for electronic transactions

Sale of Goods Act (Cap. 393): Regulates the sale of goods, including terms, conditions, warranties and rights of buyers and sellers in commercial transactions

Supply of Goods Act: Establishes requirements for quality and fitness of goods in commercial transactions, including implied terms and conditions

Competition Act (Cap. 50B): Prohibits anti-competitive practices and ensures fair competition in Singapore's markets, including regulations on business agreements

Personal Data Protection Act 2012: Governs the collection, use, disclosure and care of personal data, establishing obligations for organizations handling such data

Consumer Protection (Fair Trading) Act: Protects consumers against unfair practices and provides framework for fair trading, particularly relevant if end users are consumers

Unfair Contract Terms Act: Controls the use of unfair terms in contracts, providing protection against unreasonable contractual provisions

Goods and Services Tax Act: Regulates the application and administration of GST in Singapore, important for pricing and payment terms

Companies Act: Primary legislation governing corporate entities in Singapore, including their business operations and transactions

Copyright Act: Protects intellectual property rights related to copyright, important for any content or materials involved in the vendor agreement

Trade Marks Act: Governs the protection and use of trademarks, relevant for branding and intellectual property aspects of the agreement

Patents Act: Protects inventions and innovative processes, relevant if the vendor agreement involves patented technology or processes