The document discusses the international occupational health and safety management system specification OHSAS 18000. It originated in the 1990s as BS8800 and was later revised in 1999 as OHSAS 18001 and 18002 to be more compatible with ISO 14001. OHSAS 18000 comprises 17 elements that are designed similarly to ISO 14001 and allows for third-party certification. It provides guidelines for occupational health and safety management systems including hazard identification, legal requirements, objective setting, implementation, checking and corrective action, and management reviews.