ISO INTERNATIONAL STANDARD 23664 First edition 2021-10 Traceability of rare earths in the supply chain from mine to separated products Tracabilite des terres rares dans la chaine d'approvisionnement de la mine jusqu'aux produits séparés Reference number IS0 23664:2021(E) ISO @IS02021 IS0 23664:2021(E) COPYRIGHT PROTECTED DOCUMENT @IS02021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, withoutpriorwrittenpermission.Permission can berequestedfrom eitherIso at theaddress below orIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved