Chattels 

…to extend the current legislative term Council for the month of the current expiration date of his (Jubourri *) dismissal, in the hope that the Federal Court haste in deciding this case.”
…the extension does not exceed on 30/05/2016 because Article 58 of the Constitution decided ot only for thirty days.”
It appears that even with the thirty day extension of Parliament that May 30 is the last day of this session allowed under the constitution.
I surmise that the current session was to have ended on or about May 1st therefore the extension relates back to that date and not beyond thirty thence.