Special measures, including quotas for women and other temporary measures, as required under article 4, paragraph 1, of the Convention and general recommendations No. 23 (1997) and No. 25 (2004) of the Committee on the Elimination of Discrimination against Women, are necessary to achieve equality between men and women in political and public life, in order to contend with the underlying structural disadvantaging of women. The most significant increase in the numbers of women in national parliaments over the years has occurred in countries where special measures, such as gender quotas, have been effectively constructed and implemented. The use of quotas to advance women's political representation and participation has increased in the past three decades and produced significant results when properly adapted to specific electoral and political systems.