An engagement supervisor obtains facilities maintenance reports from a contractor during an audit of third-party...

 Authority Source: The internal audit charter is a formal document that defines the internal audit activity's purpose, authority, and responsibility. It grants internal auditors the right to access all records, personnel, and physical properties relevant to the performance of engagements.

 Facilities Maintenance Reports: When an engagement supervisor contacts a third-party contractor for maintenance reports, the authority is derived from the internal audit charter, which ensures auditors have the necessary access to perform their duties.

 Importance of the Charter: This ensures the independence and objectivity of the internal audit activity, providing a clear mandate for auditors to obtain information from external parties as needed.