2003/728/EC: Commission Decision of 3 October 2003 on the procedure for attesting the conformity of construction products pursuant to Article 20(2) of Council Directive 89/106/EEC as regards metal frame building kits, concrete frame building kits, prefabricated building units, cold storage room kits and rock-fall protection kits (Text with EEA relevance) (notified under document number C(2003) 3452)