women for different European countries is as follows. 2018 Update Law on Equal Pay Certification based on the Equal Pay Standard in Iceland Iceland introduced an Equal Pay Standard in 2012, ÍST 85:2012 (Equal wage management system - Requirements and guidance). The standard was developed by the Icelandic trade unions, the employers' confederation and government officials with the goal in mind that it would help employers prevent salary discrimination and enable them to become certified. In 2017, the Icelandic government decided to add an amendment to the 2008 laws Act on Equal Status and Equal Rights of Women and Men (#10/2008). The amendment is a law on equal pay certification and was put into effect on January 1 in 2018. According to the amendment companies and institutions employing 25 or more workers, on annual basis, will be required to obtain equal pay certification of their equal pay system and the implementation thereof. The purpose of this obligatory certification is to enforce the current legislation prohibiting discriminatory practices based on gender and requiring that women and men working for the same employer shall be paid equal wages and enjoy equal terms of employment for the same jobs or jobs of equal value. United States Federal law: Equal Pay Act of 1963 and Title VII of the Civil Rights Act of 1964 By the 20th century, women made up about a quarter of United States workforce but were still paid far less than men, whether it was the same job or a different job. There were different laws for women in some states such as, not working at night and restriction of their working hours. Women started entering more factory jobs when World War II began to replace men who were enlisted in the military. The wage gap continued to escalate during the war. The National War Labor Board put policies in place to help provide equal pay for women who were directly replacing men. The first attempt at equal pay legislation in the United States, H.R. 5056, "Prohibiting Discrimination in Pay on Account of Sex", was introduced by Congresswoman Winifred C. Stanley of Buffalo, New York, on June 19, 1944. Twenty years later, legislation passed by the federal government in 1963 made it illegal to pay men and women different wage rates for equal work on jobs that require equal skill, effort, and responsibility, and are performed under similar working conditions.