On International Women's Day, Iceland became the first country in the world to force companies to prove they pay all employees the same regardless of gender, ethnicity, sexuality or nationality,

The country's government announced a new law that will require every company with 25 or more staff to gain a certificate demonstrating pay equality.

Iceland is not the first country to introduce a scheme like this - Switzerland has one, as does the US state of Minnesota - but Iceland is thought to be the first to make it a mandatory requirement.

International Women's Day 2017: Everything you need to know

Equality and Social Affairs Minister Thorsteinn Viglundsson said that "the time is right to do something radical about this issue."

"Equal rights are human rights. We need to make sure that men and women enjoy equal opportunity in the workplace. It is our responsibility to take every measure to achieve that," he said.

The move comes as part of a drive by the Nordic nation to eradicate the gender pay gap by 2022.

In October, thousands of female employees across Iceland walked out of workplaces at 2.38pm to protest against earning less than men. After this time in a typical eight-hour day, women are essentially working without pay, according to unions and women's organisations.

Iceland has been at the forefront of establishing pay equality, having already introduced a minimum 40 per cent quota for women on boards of companies with more than 50 employees.

The country has been ranked the best in the world for gender equality by the World Economic Forum for eight years running, but despite this, Icelandic women still earn 14 to 18 per cent less than men, on average,

This compares to the UK's gender pay gap stands at 17.5 per cent and the average of the OECD group of industrialised nations of 15.5 per cent

Should the new legislation pass through the Icelandic parliament as expected, the government wants to implement it by 2020.

Google marks International Women's Day with 13 amazing women Show all 13 1 /13 Google marks International Women's Day with 13 amazing women Google marks International Women's Day with 13 amazing women Ida Wells An African-American journalist and activist born in Mississippi in 1862, she wrote prolifically on the fight for women’s suffrage as well as the struggle for civil rights. She documented the practice of lynching black people in the southern states showing how it was often used as means of controlling or punishing black people who competed with whites rather than as a means of “justice” for crimes. Google marks International Women's Day with 13 amazing women Lotifa El Nadi Egypt’s first female pilot born in 1907 in Cairo. Although her father saw no need for her to pursue secondary education, expecting her to marry and have a family, she rebelled and worked as a secretary and telephone operator at a flying school in exchange for lessons as she had no other means to pay for the training. Her achievements made headlines around the world when she flew over the pyramids and competed in international flying races. Google marks International Women's Day with 13 amazing women Frida Kahlo A Mexican painter and activist born in Mexico City in 1907, her work has been celebrated internationally as emblematic of Mexican national and indigenous traditions and by feminists for its honest depiction of female experience. Google marks International Women's Day with 13 amazing women Lina Bo Bardi A Brazilian architect, born in Italy in 1914, she devoted her life to the promotion of the social and cultural potential of architecture and design. She is also celebrated for her furniture and jewellery designs. Google marks International Women's Day with 13 amazing women Olga Skorokhodova A Soviet scientist born into a poor Ukranian peasant family in 1911, she lost her vision and hearing at the age of five. Overcoming these difficulties in a remarkable way, she became a researcher in the field of communication and created a number of scientific works concerning the development of education of deaf-blind children. She was also a teacher, therapist and writer. Google marks International Women's Day with 13 amazing women Miriam Makeba A South African singer and civil rights activist born in Johannesburg in 1932, she was forced to work as a child following her father’s death. She became a teenage mother after a brief and allegedly abusive marriage at 17, before she was discovered as a singer of jazz and African melodies. After becoming hugely successful in the US and winning a Grammy, she became involved in the civil rights struggle stateside as well as in the campaign against apartheid in her home country, writing political songs. Upon her death, South African President Nelson Mandela said that “her music inspired a powerful sense of hope in all of us.” Google marks International Women's Day with 13 amazing women Sally Ride An American astronaut and physicist, she was born in Los Angeles in 1951 and joined NASA in 1978 after gaining her PhD. She became the first American woman and the third woman ever to go into space in 1983 at the age of 32. Prior to her first space flight, she attracted attention because of her gender and at press conferences, was asked questions such as, “Will the flight affect your reproductive organs?” She later worked as an academic at the University of California, San Diego. Google marks International Women's Day with 13 amazing women Halet Cambel A Turkish archaeologist born in 1916, she became the first Muslim women to compete in the Olympics in the 1936 Berlin games as a fencer. She declined an invitation to meet Adolf Hitler on political grounds, and after the conclusion of the Second World War, she trained as an architect and later worked as an academic in Turkey and Germany. Google marks International Women's Day with 13 amazing women Ada Lovelace An English mathematician and writer born in 1815, she became the world’s first computer programmer. The daughter of poet George Byron, she is chiefly known for her work on Charles Babbage's proposed mechanical general-purpose computer, the Analytical Engine, and was the first to recognise the machine had applications beyond pure calculation, creating the first algorithm intended to be carried out by such a machine. Google marks International Women's Day with 13 amazing women Rukmini Devi An Indian dancer and choreographer credited with reviving Indian classical dance, she was born in 1904 and presented her form of dance on stage even though it was considered “low” and “vulgar” in the 1920s. She features in India Today’s list of “100 people who shaped India” having also worked to re-establish traditional Indian arts and crafts and as an animal rights activist. Google marks International Women's Day with 13 amazing women Cecilia Grierson An Argentine physician, reformer born in Buenes Aires in 1859, she became the first woman in Argentina to receive a medical degree having previously worked as a teacher. Women were barred from entering medical school at the time, so she first volunteered as an unpaid lab assistant before she was allowed to train as a doctor. She was acclaimed for her work during a cholera epidemic before going on to found the first nursing school in Argentina. The harassment she experienced at medical school helped make her a militant advocate for women’s rights in Argentina. Google marks International Women's Day with 13 amazing women Lee Tai-young Korea’s first female lawyer and judge born in 1914 in what is now North Korea, she was also an activist who founded the country’s first legal aid centre and fought for women’s rights throughout her career. Her often mentioned refrain was, “No society can or will prosper without the cooperation of women.” She worked as a teacher, married and had four children before she was able to begin her legal career after the Second World War, becoming the first woman to enter Seoul National University. She also fought for civil rights in the country and was arrested in 1977 for her beliefs, receiving a three-year suspended sentence and a ten year disbarment. Google marks International Women's Day with 13 amazing women Suzanne Lenglen A French tennis champion born in 1899, she popularised the sport winning 31 championships and dominating the women’s sport for over a decade. She was the first female tennis celebrity and one of the first international women sports stars, overcoming a childhood plagued with ill health including chronic asthma – which continued to plague her in her adult life. At 15, she became the youngest ever winner of a major championship and lost only seven matches during her entire career. She received widespread criticism for her decision to turn professional, but defended her right to make a decent living in the days when the grand slam tournaments paid a relative pittance to the winners.

Mr Viglundsson said there had been opposition to the law from those who said it represents unnecessary bureaucracy.

"It is a burden to put on companies to have to comply with a law like this," he acknowledged. "But we put such burdens on companies all the time when it comes to auditing your annual accounts or turning in your tax report.

"You have to dare to take new steps, to be bold in the fight against injustice."