The purpose of this chapter is to specify board practice pertaining to the fixing of minimum prison terms. The following regulations set forth procedural guidelines. They do not create procedural or substantive rights in any person, and should not be interpreted or applied in such a manner as to abridge rights already guaranteed by the United States Constitution. The regulations should be interpreted to have sufficient flexibility so as to be consistent with law and to permit the indeterminate sentence review board to accomplish its statutory purposes.