Which of the following statements is a principle of Natural Justice?

The principle of Natural Justice fundamentally revolves around fairness in legal proceedings and decision-making processes. One of its key tenets is that no individual should have the power to judge a case in which they have a personal interest. This principle aims to ensure impartiality and fairness in adjudication, reinforcing the idea that a judge or decision-maker must be unbiased and free from conflicts of interest.

The other statements, while they may be relevant in certain legal contexts, do not epitomize the core principles of Natural Justice. For instance, the idea that decisions must be final and non-appealable does not align with the philosophy of Natural Justice, which often allows for appeals or reviews as a means of further ensuring fairness. The suggestion that all disputes must be settled through mediation does not reflect Natural Justice principles, as mediation is only one of many methods for resolving disputes, and not a requirement. Lastly, while representation by legal counsel can be important, it is not an absolute necessity in every situation under the principles of Natural Justice; individuals may represent themselves in many legal matters.

Thus, the statement that no man can judge his own cause is the most reflective of the principles of Natural Justice, emphasizing the need for impartiality and fair processes in legal proceedings.