. . . in any civilised society it is a function of government to maintain courts of law to which its citizens can have access for the impartial decision of disputes as to their legal rights and obligations towards one another individually and towards the state as representing society as a whole. The provision of such a system for the administration of justice by courts of law and the maintenance of public confidence in it, are essential if citizens are to live together in peaceful association with one another.

. . . first that all citizens should have unhindered access to the constitutionally established courts of criminal or civil jurisdiction for the determination of disputes as to their legal rights and liabilities; secondly, that they should be able to rely upon obtaining in the courts the arbitrariment of a trial which is free from bias against any party and whose decision will be based only upon those facts which have been proved in evidence adduced before it in accordance with the procedure adopted in courts of law; and thirdly that, once the dispute has been submitted to a court of law, they should be able to rely upon there being no usurpation by any other person of the function of that court to decide it according to law.