COMMISSION DECISION of 8 May 2006 amending Decision 2001/171/EC of the European Parliament and of the Council for the purpose of prolonging the validity of the conditions for a derogation for glass packaging in relation to the heavy metal concentration levels established in Directive 94/62/EC (notified under document number C(2006) 1823) (Text with EEA relevance) (2006/340/EC)