what u refer to may find a solution in the third point made in the declaration  (ECRML) "3. The French Government interprets Article 7-1, paragraph f, and Article 8 to mean that they preserve the optional nature of the teaching and study of regional or minority languages, as well as of the history and culture which is reflected by them, and that the purpose of this teaching is not to remove from pupils enrolled in schools on the national territory the rights and obligations applicable to all those attending establishments providing the public education service or associated therewith."
remains interesting since it acknowledges "the history and culture reflected by them" gaps significantly with the "official state history and culture", obviously lacking, to say the least, the history and culture of the persons belonging to these minorities. That explains the need they felt to mention it in the declaration? ask the legal people how they want it documented.
See what I mean? Why would you mention and insist on the optional character of studying "the history and culture which is reflected by them (minorities languages) to later mention and insist on "not to remove pupils enrolled..... the rights and obligations.....providing the public education service" if the public service programs in these areas of teaching was providing a sincere history and culture of the persons that belong to these minorities?