In this question you are being asked to identify if the company publishes whether the policy (or policies) is part of the purchase agreement or if a supplier signature is required. Start by searching for a statement that the policy (or policies) is part of a purchasing agreement or requires the suppliers/vendors signature.

This statement may appear in/on:
- The Code of Conduct
- The supplier terms of engagement
- The supplier guidebook
- The vendor agreements
- A Modern Slavery Statement or California Transparency
- Company documents
- Company policies
- Company websites
- Company code of conduct
- Parent company documents (only if the parent company is linked to from the brands website)
- Parent company policies (only if the parent company is linked to from the brands website)
- Parent company websites (only if the parent company is linked to from the brands website)
- Parent company code of conduct (only if the parent company is linked to from the brands website)
- Act disclosure

Good keywords for your searches include:
- Signature
- Sign
- Contractual relationship
- Purchasing Agreement
- Contractually required

Things to watch out for:
- Information should only be used from a parent company documents or website when the brand has linked to the parent company from their own website