Rank-order rules

3. ... Under penalty of inadmissibility, in the internal succession of the lists in multi-member constituencies, the candidates are placed according to an alternating gender order.

3.1. In the overall candidatures presented by each list or coalition of lists in single-member constituencies at national level, neither gender can be represented by more than 60 percent, with rounding to the nearest whole number. In the overall lists in the multi-member constituencies presented by each list at national level, neither gender can be represented in the position of head of the list by more than 60 percent, with rounding to the nearest whole number. … 

3-bis. Except as provided for in paragraph 3, a list of four alternate candidates, two male and two female, is attached to the list. (Article 18-bis)