1. Intellectual Property Rights: Required when the purchase involves goods with associated IP rights, specifying ownership and usage rights

2. Export Controls: Necessary for international sales involving goods subject to export regulations

3. Installment Payment Terms: Include when purchase price is to be paid in installments, detailing payment schedule and interest

4. Insurance: Required when specific insurance arrangements are needed during transit or for high-value items

5. Confidentiality: Important for transactions involving sensitive commercial information or trade secrets

6. Force Majeure: Optional clause detailing handling of extraordinary events affecting performance

7. Competition Law Compliance: Required for B2B transactions that might have competition law implications

8. Third Party Rights: Necessary when third parties have interests in or rights related to the purchase object

1. Technical Specifications: Detailed technical description of the purchase object, including drawings, plans, or specifications

2. Delivery Schedule: Detailed timeline for delivery, especially for multiple deliveries or complex logistics

3. Price List: Detailed breakdown of prices, especially for multiple items or varying quantities

4. Quality Requirements: Specific quality standards, testing procedures, and acceptance criteria

5. Warranty Certificate: Detailed warranty terms and conditions, including coverage and claim procedures

6. Due Diligence Documents: Relevant certificates, permits, or documentation proving ownership or compliance

7. Payment Schedule: Detailed payment terms and milestones, particularly for installment payments