DUP MP Gregory Campbell has said the INLA's decommissioning of weapons was long overdue.
The Republican paramilitary organisation is expected to confirm this week that it has put its weapons beyond use.
Mr Campbell said that other groups still holding weapons should do the same and ensure that history is not re-written.
The British government had set a deadline of 14 February for the decommissioning of all paramilitary weapons.
'All too often when moves like this occur, there is a tendency to forget what was carried out by these groups,' said Mr Campbell.
'All of them should decommission their weapons, none of them should have been armed and able to murder in the first instance and the regret is that there are still people mourning their previous actions and the heartache they left behind.
'Now is the time to ensure that history is not re-written, just as those who were in the Provisional IRA and the Loyalist paramilitary organisations must not be allowed to try and justify the unjustifiable the same principle must apply to the INLA.
'As we move to the future we must not forget the past.'
