(a) The Board of Pardons and Paroles shall enter into an agreement with the United States Immigration and Naturalization Service for the deportation of persons incarcerated in correctional facilities in the state who are aliens upon the conditioned commutation of their punishment by said board.(b) The Board of Pardons and Paroles may grant a commutation of punishment in the case of any person incarcerated in a correctional facility in the state who is an alien and transfer such person to the United States Immigration and Naturalization Service for deportation in accordance with the agreement entered into pursuant to subsection (a) of this section provided such person agrees not to contest his criminal conviction and deportation.