The French Supreme Court had already determined that distinctive treatments between employees of diverging professional categories, or those with different occupations in the same category, when resulting from conventions or collective agreements, were justified. Recently, it ruled that differences (such as a specific pay scale), between employees of the same company, working at different sites, if implemented as a result of a site agreement, are also justified. An employee seeking to contest his treatment, which differs from that of another site, will have to prove that the difference is not based on a professional reason.
France