An administrative review of the parole violation report and of information submitted by the alleged violator or his attorney shall be conducted by the board after the parolee has been arrested, to determine probable cause for suspension. If probable cause is found then a determination is made whether the violation requires a revocation hearing, and to determine whether there is reason to allow the parolee to be conditionally released on parole pending the revocation hearing. Such administrative review shall take place within fifteen days after the service of the order of parole suspension, arrest, and detention.