Employment Act (Chapter 91): Primary legislation governing employment relationships in Singapore, covering basic terms and conditions of employment, employee rights, employer obligations, and fair treatment requirements.

Fair Consideration Framework: Framework that establishes guidelines on fair employment practices and non-discriminatory requirements in Singapore's workplace context.

Tripartite Guidelines on Fair Employment Practices: Guidelines setting standards for performance management, fair and objective assessment criteria, and documentation requirements for employee evaluation.

Personal Data Protection Act (PDPA): Legislation governing the handling of employee personal information, including confidentiality requirements and data storage/protection protocols in performance management documents.

Industrial Relations Act: Act relevant for unionized employees, establishing procedural requirements for performance management and union involvement where applicable.

Tripartite Guidelines on Wrongful Dismissal: Guidelines ensuring PIP process is fair and properly documented, including procedures to avoid wrongful dismissal claims and proper documentation of performance issues.

Workplace Safety and Health Act: Legislation relevant when performance issues relate to safety compliance or health-related performance concerns in the workplace.