p4 - McDonald's frequently audits their supplies "to ensure their employment practices are suitable and in line with" the company's employment standards.
P6 - As part of the audit, modern slavery risks are addressed and "country-level human rights risk analyses are used to help inform the audit cycles for suppliers." Facilities in "countries that are considered to be at high risk require more regular on-site audits, regardless of the outcome of previous audits."
P6 - The Supplier Workplace Accountability (SWA) program "also includes on-site announced and unannounced audits conducted by third-party auditing firms to assess compliance with the Code." On-site audits conducted by third-party auditing firms can be announced and unannounced, where they make "physical inspections of the facility and include visits to housing and cafeteria for workers."