The Department shall submit to the Parole Board a recommendation relative to whether the offender should be released to parole pursuant to section 501 of this title when:
(1) an offender sentenced solely for the commission of one or more unlisted crimes has, in the sole discretion of the Department, successfully completed 90 days of community supervision furlough; or
(2) an offender sentenced for the commission of at least one or more listed crimes has, in the sole discretion of the Department, successfully completed 180 days of community supervision furlough.