Artikel 31

1. In the case of a dispute the occasion of which, according to the municipal law of one of the parties, falls within the competence of its judicial or administrative authorities, the party in question may object to the matter in dispute being submitted for settlement by the different methods laid down in the present General Act until a decision with final effect has been pronounced, within a reasonable time, by the competent authority.
2. In such a case, the party which desires to resort to the procedures laid down in the present General Act must notify the other party of its intention within a period of one year from the date of the aforementioned decision.