The income from employment that forms the basis for calculating the penalty referred to in article L. 2242-8 is that for the whole month following the end of the formal notice referred to in article R. 2242-3. The penalty is due for each full month from the end of the formal notice referred to in article R. 2242-3 and until receipt by the Labour Inspectorate, as the case may be, of the agreement relating to professional equality concluded following the negotiations referred to in 2° of article L. 2242-1, the action plan provided for in article L. 2242-3, the agreement or decision of the employer referred to in article L. 1142-9 or proof of publication of the indicators referred to in article L. 1142-8.