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Gold NFRC/AWS permanent certification labels demonstrate certification to building officials and other end-users for compliance with building code and incentive program energy and structural performance requirements. They are typically affixed to window head concealed by a sash in the closed position, most fitting into a channel as narrow as 5/8-inch wide. NFRC permanent labels must be applied with an accompanying temporary label to be removed by the consumer after final inspection by a building inspection official.