No.
The intent behind this approach, which is still the one used not only in Quebec, but also in most provinces, is not to rule out or eliminate the requirements of one of the two levels of government with regard to environmental assessments, but rather to work hand in hand so that there is only one assessment, which is conducted jointly.
In practice, in Quebec, that's done in the manner you described, with the addition, to the two regular members of the Bureau d'audiences publiques sur l'environnement, of a third member appointed by the minister of the environment. It becomes a joint commission where they prepare a report that is considered by both governments.