Workers covered by an occupational health and safety management system In Spain, the occupational safety and health (OSH) management systems apply to all company personnel; to all temporary employment agency workers assigned to Iberdrola group work centres in Spain; to all personnel of its suppliers of equipment, products, materials, works and services; and, in general, to all personnel of other companies that work at any Iberdrola work centres in Spain, affecting all pertinent processes and scopes, whether legal or regulatory and whatever the activities they perform.