Ordinarily, Members of Parliament not holding Ministerial positions are supposed to seat on the backbenches.
And Speaker of the National Assembly Patrick Matibini told the house that he had been informed of the changes made resulting in Mr Lubinda being relegated to the backbench while his deputy Effron Lungu has moved to the front bench.
Dr Matibini who could not elaborate further on the changes said further details would be given.
The Speaker was ruling on a point of order raised by Zambezi west Members of Parliament Charles Kakoma who wanted to know whether it was in order for Mr Lubinda to seat on the backbench.
Dr Matibini in his ruling said the Kabwata MP was in order to sit on the backbench.
Mr Lubinda has been facing disciplinary action from his party on allegations of treachery and disloyalty.
There have been growing calls from PF members demanding his expulsion from the party.