Suppliers, facilities and subcontractors within their supply chain should ensure working hours, rest breaks, and meal breaks fall within legal requirements. Each facility should have a defined workweek that is communicated to and understood by all workers. Workers are allowed at least one day off (at least 24 consecutive hours) in every seven days. If local law allows, workers may voluntarily work overtime on rest days, provided they have one day off within the next seven days. Continuous working days are never to exceed 21 days without a rest day.