The binding legal principles established are: (1) An indeterminate sentence without a prescribed maximum period that could result in life imprisonment for non-violent habitual offenders constitutes cruel, inhuman or degrading punishment in violation of section 12(1)(e) of the Constitution. (2) A sentence that is grossly disproportionate to the offences committed violates section 12(1)(e). (3) Where a convicted person poses no threat of violence or danger to society, potential indefinite incarceration is grossly disproportionate and unconstitutional. (4) The indeterminacy of a sentence, leaving the period of incarceration dependent on executive discretion with no prescribed maximum, exacerbates the cruel, inhuman or degrading nature of the punishment. (5) Where constitutional invalidity results from an omission in legislation, and striking down the provision would have inappropriate consequences, the remedy of reading-in is appropriate where: (a) the words to be read in can be defined with sufficient precision; (b) the reading-in is faithful to the legislative scheme; (c) it is consistent with the Constitution and its fundamental values; and (d) it does not result in unsupportable budgetary intrusion. (6) An order reading words into legislation to cure constitutional invalidity, though operating prospectively, applies to all persons currently detained under the provision because imprisonment is an ongoing process.