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1. Performance Bond: Required when project value exceeds certain threshold or when specifically requested by main contractor

2. Environmental Compliance: Required for projects with specific environmental impact considerations

3. Training and Technology Transfer: Include when local content development is required or beneficial

4. Intellectual Property: Include when custom designs or innovative solutions are part of the scope

5. Force Majeure: Optional but recommended given Nigeria's business environment

6. Local Content Requirements: Include when project falls under Nigerian local content regulations

1. Schedule 1 - Detailed Scope of Work: Detailed specifications of plumbing works including drawings and technical requirements

2. Schedule 2 - Bill of Quantities: Itemized list of materials, labor, and costs

3. Schedule 3 - Project Timeline: Detailed project schedule with milestones and completion dates

4. Schedule 4 - Payment Schedule: Breakdown of payment amounts and timing

5. Schedule 5 - Required Insurance Coverage: Specific insurance types and coverage amounts required

6. Schedule 6 - Quality Control Procedures: Detailed quality assurance and control procedures

7. Appendix A - Safety Procedures: Specific safety protocols and requirements

8. Appendix B - Required Certifications: List of required certifications and qualifications for personnel