Late last year it announced that it was calling off its campaign and committing itself to purely peaceful means.
Next Monday it is due to announce that has engaged with the Decommissioning Body, chaired by General John de Chastelain and that its arsenal has been put beyond use, in the presence of a number of international observers.
The INLA killed more than 100 people during the Troubles.
The splinter group was responsible for some of the most infamous attacks of the period, including the killing of the British Conservative MP, Airey Neave, in 1979.
The DUP MP Gregory Campbell has said the INLA's decommissioning of weapons was long overdue.
Mr Campbell said other groups still holding weapons should also put their arsenals beyond use.
