The Government announced on March 2006 that it will strengthen the Code for Sustainable Homes alongside the introduction of new tougher building regulations, in order to address climate change. Ministers have approved new building regulations which set mandatory standards that every new home must meet. The regulations, which will come into effect on 6 April 2006, raise the energy efficiency of new buildings by 40 per cent, compared to 2002. They will also improve compliance by introducing air pressure testing for new buildings. In addition, energy efficiency ratings - which form one component of the Code - will be made mandatory for new homes and existing homes. The ratings will be included in energy performance certificates set out to EU standards.