Sale of Goods Act (SOGA): Primary legislation governing contracts for sale of goods in Singapore. Defines rights and obligations of buyers and sellers, including passing of title, delivery requirements, and quality standards for goods.

Contract Law (Amendment) Act: Fundamental law governing contract formation, validity and enforcement in Singapore. Based on common law principles and covers essential elements like offer, acceptance, consideration, and intention to create legal relations.

Electronic Transactions Act: Legislation providing legal recognition and framework for electronic transactions, including the validity of electronic signatures and records in commercial contracts.

Consumer Protection (Fair Trading) Act: Law protecting consumer interests in commercial transactions, applicable if one party is a consumer rather than a business entity.

Unfair Contract Terms Act: Legislation regulating the use and enforcement of exclusion clauses in contracts, including the application of reasonableness test for contract terms.

Goods and Services Tax Act: Tax legislation relevant to commercial purchases in Singapore, governing GST obligations and requirements.

UN Convention on Contracts for International Sale of Goods (CISG): International treaty governing cross-border sale of goods, relevant if the commercial purchase involves international trade.

Industry-Specific Regulations: Regulatory requirements specific to particular industries or types of goods being purchased under the contract.

Competition Law: Legal framework ensuring fair competition and preventing anti-competitive practices in commercial transactions.

Import/Export Regulations: Laws and regulations governing the import and export of goods, including customs requirements and trade restrictions.