The EQUAL-SALARY certification is presented as follow under labels, charters and awards : ” In 2010, the European Commission published a study containing an inventory of these non-legislative instruments to promote gender equality in companies in Europe. Some of these instruments take into account the gender pay gap as a factor. Switzerland provides the clearest example of a specific company certificate on the gender pay gap: companies can be awarded an equal pay logo if they show they have implemented a fair wage policy between women and men.”
See the mention of EQUAL-SALARY Foundation in the study, page 21 : Tackling Gender Pay Gap, EU Report 2014