Employment Act (Chapter 91): Primary legislation governing employment terms and conditions in Singapore. Applies to all employees except domestic workers and seafarers. Covers basic employment terms, working hours, leave entitlements, and other fundamental rights.

Workplace Safety and Health Act: Legislation ensuring safety, health and welfare of persons at work. Critical for work orders involving physical labor or on-site work activities.

Contract Law (Common Law): Framework governing contract formation, including offer and acceptance principles, consideration elements, and general contractual obligations under Singapore's common law system.

Employment of Foreign Manpower Act: Regulates the employment of foreign workers in Singapore, including work permit requirements, visa regulations, and employer obligations towards foreign employees.

Personal Data Protection Act (PDPA): Governs the collection, use, and disclosure of personal data. Ensures proper handling of personal information in employment contracts and requires appropriate consent mechanisms.

Central Provident Fund Act: Mandates CPF contributions and outlines employer obligations for social security savings. Specifies contribution rates and compliance requirements for employers.

Work Injury Compensation Act: Provides framework for work-related injury compensation and insurance requirements. Essential for work orders involving potential workplace risks.