In 2001 and up to February 2002, Spain's public business entity, IDAE, which answers to the Ministry of Industry, Tourism and Trade, signed a range of voluntary agreements. These included: - Framework co-operation agreement with RENFE (Spanish Railways), to implement energy optimisation measures and also to use renewable sources of energy in buildings, installations and on land belonging to RENFE. - Framework co-operation agreement with the Ministry of Education and Sports for technical assistance in the call for tender for the supply of electricity to various units of the Ministry considered as qualified consumers. - Framework co-operation agreement with Barcelona Council for the implementation of the Programa Barcelona 2004 and the implementation of the Barcelona Council Municipal Energy Plan. - Framework co-operation agreement with Palma de Mallorca Council for the joint development of a Municipal Energy Action Plan. - Framework co-operation agreement with Majadahonda (Madrid) Council for the development of a Municipal Energy Action Plan. - Framework co-operation agreement with the Spanish Federation of Municipalities and Provinces (Federación Española de Municipios y Provincias, FEMP) for the promotion and dissemination of energy-efficient technologies and renewable energy sources (RES) among Spanish municipalities. - Specific agreement with Saragossa (Zaragoza) Council and Saragossa University for conducting feasibility studies regarding the application of renewable energy sources (RES) and energy saving criteria in the Valdespartera housing development. - Co-operation agreement for the promotion of energy efficiency and renewable sources of energy (RES) in Soto del Real.