(1) Each inmate should prepare a comprehensive release plan for the board's consideration, including a suitable living situation, gainful employment or a training or schooling program that has been guaranteed by some responsible and reputable person, firm or institution. However, the board may, at its discretion, grant a parole with the substantial prospect of gainful employment, training or schooling. All plans will be reviewed by the board staff and must be verified through investigation by the department of corrections prior to release on parole. Substantial changes in the parole plan, submitted at the time of parole hearing, must be reviewed and approved by the board.