34SIf, however, the Scottish Ministers, having regard to the need to protect the public, are of the view, at any time between the time when they fixed the provisional release date for the prisoner and that date, that the prisoner’s conduct has been such that or that there has been a material change of circumstances such that the Parole Board should review the recommendation to release the prisoner on licence, they may refer to the Board the question of such release in the light of that conduct or that change of circumstances.