Gender mainstreaming was introduced into the policy framework in Ireland through the European Structural Funds (ESF). The European Commission (EC) requirement meant that projects supported by Structural Funds were to be implemented in accordance with the principle of promoting equal opportunities. Gender mainstreaming was introduced into the policymaking process in Ireland through the National Development Plan 2000–2006 (NDP), the country’s multi-annual investment strategy. While ESF regulations applied only to those projects supported by the Structural Funds, the Irish government decided to apply the requirements to all measures, with a few limited exceptions. This decision was underpinned by the establishment of the NDP Gender Equality Unit within the Department of Justice, Equality and Law Reform. However, this unit ceased operation at the end of 2007 and its re-establishment as the Central Gender Mainstreaming Unit was foreseen by the National Women’s Strategy covering the period between 2007 and 2016. This strategy represents the current framework for the implementation of gender mainstreaming.