http://www.ilo.org/public/english/protection/safework/cis/managmnt/ioha/index.htm

This report analyzes the nature and content of 24 Occupational Health and Safety Management System (OHSMS) Standards, Codes of Practice and Guidance Documents from 15 countries, and for the purpose of comparison, the International Standards ISO 14001:1996 on Environmental Management Systems, and a draft ISO Standard on Health, Safety and Environmental Management in the Petroleum and Natural Gas Industries.