§. 1. The representative or senator, who as a candidate for the elections to the Chamber of Representatives is elected, is considered as resigning from his old mandate on the day of the validation of his new mandate or the additional verification of the powers as mentioned in article 235.
The member of the Chamber of Representatives, who is elected as co-opted senator, loses his quality as a representative the instant he takes the oath as senator. The co-opted senator who as a substitute, achieves the mandate as a representative, loses his quality as senator the moment he/she takes the oath in the Chamber.
§ 2. The member of the Chamber of Representatives or the co-opted senator who has campaigned for the Flemish Parliament, the Walloon Parliament, the Brussels Regional Parliament, the Parliament of the German-speaking Community or the European Parliament, and who has been elected, loses his status as a member of the Chamber of Representatives or as a co-opted senator on the day of the validation of his/her news mandate.
S/he equally loses the full right the moment s/he refuses the new mandate between the day of the proclamation of the elected persons and the day of the validation of her/his new mandate.
The first and sentence two are equally to be applied to the members of the Chamber of Representatives or to the co-opted senators who have stopped to seat after their nomination as a minister or state secretary of the federal government, or after their election as a minister or state secretary of a municipal or regional government.