Translate the following English sentence to French:
"In fact, the significance of this document is obvious if it is regarded as a potential preamble to a European constitution; conversely, it would be redundant in those Member States that already include these rights in their own constitution and legal traditions and confirm them by ratifying international texts such as the European Convention and the Universal Declaration of Human Rights."
En effet, l' intérêt d' un tel texte est évident si on le considère comme le possible préambule d' une Constitution européenne ; à l' inverse, il ferait double emploi dans le cas d' États membres qui incluent lesdits droits dans leur propre Constitution et leurs traditions juridiques et les confirment par la ratification de textes internationaux comme la Convention européenne ou la Déclaration universelle des droits de l' homme.