The document discusses the principles of natural justice that must be followed in judicial and administrative proceedings. It states that these principles are presumed to be incorporated in all statutes unless expressly excluded. It defines bias as an inclination or bent, and discusses different types of bias including pecuniary bias from a direct interest in the proceedings or decision, and personal bias from relationships to the parties. Personal bias can arise from natural relationships, professional relationships, professional hostility, or acting as counsel in earlier stages of the case. The deciding authority must be impartial and justice must not only be done but seen to be done.