Governments across the world legislate global OH requirements with a huge disparity and implementation. For example the UK has little statute regarding OH but standards are mandated via other vicarious processes such as a Duty of Care, Common Law and the Health and Safety at Work Act. In contrast, China uses a codified system of Law and has introduced many codified OH standards in recent years
However there is a surprising congruency between nations. Global organisations such as the WHO and NIOSH recommend standards
For multinational companies, reputation and logistics are the main drivers for companies adopting common OH standards throughout their operations and increasingly companies apply single OH standards across all their operations.
For example hearing regulations are remarkably congruent: A recent study found that many countries in the Americas specified a PEL of 85 dBA
ILO Codes of Practise are not legally binding on member governments. However they may be used to support an allegation of negligence by an injured worker in the search for a minimum standard of practise.
Implementation of and compliance with OH legislation and regulation may be patchy, especially in developed countries (e.g Artesanal mining)