After Article 21, a new Article 21.a is added and reads:

"Article 21.a

At the time of establishing and nominating party slates and independent slates for the election of representatives to the Parliament, the persons nominating the slates shall act in conformity with the principle of gender equality and bear in mind a balanced representation of women and men on such slates.

The slate for the election of representatives to the Parliament is in line with the principles referred to in paragraph 1 of this Article if the slate includes at least 40% of persons of each gender. A slate that does not include at least 40% of persons of each gender shall not be valid."