“Gender equality benefits all of us,” Iceland’s Prime Minister Bjarni Benediktsson said on International Women’s Day, as his government works on a law to require companies to show they pay men and women the same salary for the same work.

Benediktsson discussed the plan in New York, where he attended an International Women’s Day summit and other meetings this week.

The law, which is believed to be the first of its kind at the national level, would apply to all companies with more than 25 employees, Benediktsson said. Companies would need to undergo certification every three years to ensure that their pay policies follow the rules.

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