The purpose of this GTZ working paper is to provide guidance for the mainstreaming of a gender approach in new aid architecture and aid modalities. The author argues that gender equality is still not being adequately addressed or mainstreamed in current aid architecture and modalities. In practice, this offers an opportunity to incorporate gender into the new modalities as a guide for action, based on the principles set forth in the 2005 Paris Declaration on Aid Effectiveness and the Accra Agenda for Action. The publication maps out how development experts can integrate gender dimensions into their own work context, enabling them to operationalise these dimensions systematically into programmes at the implementation level. The paper was written by Dr Christine Muller and published by GTZ in March 2009.