Prior to the challenge provided for in Article L. 7343-10, the elector or a representative designated by him shall submit an appeal to the Director General of the Autorité des relations sociales des plateformes d’emploi concerning registration on the electoral roll. This appeal must be lodged, on pain of inadmissibility, within seven days of the date referred to in 1° of II of Article R. 7343-10, by any means capable of establishing a date of receipt. An acknowledgement of receipt is sent to the applicant.