Sikh groups have campaigned for years to close a loophole in existing UK employment legislation which meant that Sikhs were exempt from safety headgear only in high-risk areas, such as construction sites.
The Sikh Council UK had argued that this had led to turban-wearers facing discrimination in other low-risk areas such as factories, warehouses and transport.
An amendment introduced to the Deregulation Bill by the UK government with cross-party support in March 2014 has now been granted Royal Assent this week, making it a law.
"It will make a real difference to Sikhs in the UK by increasing the number of workplaces that members of the community can work in whilst maintaining their religiously mandated identity," he added.
More From This Section
It said the rules led to a number of cases where Sikhs faced disciplinary hearings and were dismissed from longstanding employment for their refusal to remove their turban and wear a safety helmet.
Their campaigning led to an amendment to extend the exemption in the Employment Act to be introduced to the Deregulation Bill last year.
The change also further provides protection for employers by extending the limitation on liability for employers in the construction industry to any work situation where a turban-wearing Sikh chooses not to wear a safety helmet.