The Ecodesign Directive establishes a framework for the setting of ecodesign requirements for products that use energy. It is one of the pillars of EU strategy on energy efficiency and Member States were required to transpose it into their national law by August 2007. In September 2007 the Commission sent formal letters to Finland, Greece, Portugal and Luxembourg for failure to inform the Commission of full transposition of the Directive. In February 2008, as the Member States in question had still failed to transpose the Directive into their national law, the Commission initiated the second stage of the infringement procedure by addressing reasoned opinions to each of them. The first ecodesign requirements are expected to enter into force next year, making it essential for the necessary provisions to be transposed into national law before then.