The ISO/PAS 17712:2013 standard need that container freight seals meet or exceed certain standards for strength and durability so as to prevent accidental breakage, early deterioration (due to weather conditions, chemical action, etc.) or undetectable tampering under usual usage. ISO/PAS 17712:2013 also needs that each seal be clearly and legibly marked with a unique recognition number.
ISO 17712:2013 establishes uniform process for the classification, acceptance, and withdrawal of mechanical freight container seals. It provides a single source of information on mechanical seals which are acceptable for securing freight containers in international commerce.