Zone de Texte: Since 2006 the performance based approach has been included in the ISTA accreditation. This allows member laboratories to become accredited to use methods that are not included in the Rules. The validation must be as comprehensive as for methods to be included in the Rules. Zone de Texte: Performance based approach Zone de Texte: Since 2006 the performance based approach has been included in the ISTA accreditation. This allows member laboratories to become accredited to use methods that are not included in the Rules. The validation must be as comprehensive as for methods to be included in the Rules. Zone de Texte: Performance based approach

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