The development of gender statistics should be specified within the legal framework of official statistical systems (United Nations, 2006). Of crucial importance to improving the availability of gender statistics is the specification of formal requirements for sex- disaggregation and the incorporation of a gender perspective within the national statistical legislation that regulates the production and dissemination of official statistics. In order to expand the range of information available for gender analysis, requirements need to be established not only for statistics already officially collected by the national statistical office, but also for other sources of data, particularly administrative data being collected and disseminated by other Government agencies and by organizations in the public and private sectors (United Nations, 2006).