A spokesman for Mr Carter said that until the August 1 hearing, "there is no change to Mr Banks' status as a member of Parliament".
Whether Mr Banks had been immediately convicted and ejected from Parliament or not makes little difference to the stability of the Government which would retain a majority anyway with United Future and the Maori Party.
Despite Opposition calls for Mr Banks to resign his seat immediately, Mr Key said he still stood by the former Act Leader.
"In the end, Mr Banks may appeal. I don't know the details of that but in my experience of dealing with him over the period of time that he's been both the leader of the Act Party and in Parliament, and in my previous dealings with him, I've always found him to be very honest."
Mr Cunliffe said Justice Wylie's decision to leave sentencing and the issue of conviction until after Parliament rose was "unusual".
For the next five weeks, he said, New Zealanders were going to see "a person who is guilty of electoral fraud and they are going to know that this Government is being propped up by a rotting political carcass who has lost all moral legitimacy".