贸促会出具的CO产地证还需要做商会认证吗

信用证有一条：CERTIFICATE OF ORIGIN IN DUPLICATE ISSUED EITHER BY SUPPLIER AND CERTIFIED BY THE CHAMBER OF COMMERCE OR ISSUED BY THE CHAMBER OF COMMERCE,STATING NAME AND ADDRESS MANUFACTURER OF SHIPMENT AND WE ARE HEREBY STATING THAT ALL GOODS CONTAINED IN SHIPMENT ARE OF CHINA ORIGINS(S).

由出口商出具或贸促会出具的产地证,并经中国商会认证的产地证一式两份,在货描处显示生产商的名称和地址,并打上WE ARE HEREBY STATING THAT ALL GOODS CONTAINED IN SHIPMENT ARE OF CHINA ORIGINS(S).我这样子翻对吗?IN DUPLICATE,这个条件我能满足吗?因为到时我只能找贸促会做产地证,产地证是只有一份正本的.