Providing that, if eligible for parole, a person or an inmate who is serving a sentence of life imprisonment based on a first degree murder conviction involving circumstances in which the eligible person or inmate was not a principal in the first degree to the crime may be paroled without the approval of the Governor; providing that the Board of Review of Patuxent Institution or the Maryland Parole Commission shall make a specified determination by a preponderance of the evidence; etc.