This question is looking to understand the company's management structure and responsibilities allocated to minerals due diligence and sourcing.
A 'Yes' answer can include any kind of description of the individuals, departments or teams in charge of responsible minerals sourcing, and/or involvment of executives in such.
If the management structure is not described in relevant reports, the answer will be 'No'.
The answer will only be 'Unknown' if the company has no reporting for a particular year.