of the European Social Charter, and Article 15 of African Charter on Human and Peoples' Rights. The Constitution of the International Labour Organization also proclaims "the principles of equal remuneration for equal value". The EEOC's four affirmative defenses allows unequal pay for equal work when the wages are set "pursuant to (i) a seniority system; (ii) a merit system; (iii) a system which measures earnings by quantity or quality of production; or (iv) ... any other factor other than sex." A pay differential due to one of these factors is not in breach of the convention. Legal situation by jurisdiction European Union/European Economic Area Post-war Europe has seen a fairly consistent pattern in women's participation in the labour market and legislation to promote equal pay for equal work across Eastern and Western countries. Some countries now in the EU, including France, Germany, and Poland, had already enshrined the principle of equal pay for equal work in their constitutions before the foundation of the EU (see table below). When the European Economic Community, later the European Union (EU), was founded in 1957, the principle of equal pay for equal work was named as a key principle. Article 141 of the Treaty of Rome says "each Member State shall ensure that the principle of equal pay for male and female workers for equal work or work of equal value is applied." While socially progressive, this decision does not necessarily indicate widespread progressive attitudes among the signatories to the treaty: While this is often viewed as an example of the progressive nature of the European community, some argue that Article 141 (previously 119) was included largely as a concession to the French who already had equal pay legislation and feared that they would be at a comparative disadvantage. The EEC's legislation was clarified in 1975 by the binding and directly applicable equal pay directive 75/117/EEC. This prohibited all discrimination on the grounds of sex in relation to pay; this and other directives were integrated into a single Directive in 2006 (2006/54/EC). At the national level the principle of equal pay is in general fully reflected in the legislation of the 28 EU member states and the additional countries of the European Economic Area (EEA), Iceland, Liechtenstein and Norway. The EU candidate countries of Macedonia and Turkey also adapted their legislation to EU standards. The main national legislation concerning pay equity between men and