<P> Crown buildings (national government buildings) are no longer totally exempt the Building Regulations . All Crown buildings must comply with the energy efficiency measures set out in Part L . This is due to EU laws requiring higher energy efficiency in all buildings (new and existing) under European "climate change" measures such as the EU Energy Performance of Buildings Directive . EU law requires public buildings to be "good energy practice" examples . </P> <P> New energy regulations have been made to fully implement these EU laws, where they fall outside the scope of the building regulations . </P>

When was part l of the building regulations introduced