Any clause appearing in particular in an employment contract, a collective work agreement or any provision that appears in internal corporate regulations and includes, for one or more employees of one of the two sexes, a salary lower than that of employees of the other sex for the same work or work of equal value, is null and void.
The higher salary enjoyed by the better-paid employees automatically replaces the lower salary. The judge hearing a case will therefore only have to substitute the higher salary and this - ab initio - for that of the employee concerned.