Traditional Ordinations in France.

Rorate Coeli has a post mentioning that three deacons are to be ordained priests in France using the traditional (pre 1968) liturgies. These are to take place in Chartres Cathedral later this month and the officiating bishop will be Bishop Mark Aillet of Bayonne. From the way that the report is written, I am assuming that the three ordinands will be diocesan priests and that they come from different dioceses. If this assumption is correct, it would seem to break new ground. At least in some dioceses in France, ordinands are being given the choice between the old and the new forms, when it comes to their priestly ordination. Does anyony have any more information on this development?