The statute or the measures taken pursuant to the statute must be examined in order to determine, first, whether the function is an integral part of, or is closely connected with, the functions of the Legislature or the Executive Government. If the function is not closely connected with the Legislature or the Executive Government, no constitutional incompatibility appears. Next, an answer must be given to the question whether the function is required to be performed independently of any instruction, advice or wish of the Legislature or the Executive Government, other than a law or an instrument made under a law (hereafter "any non-judicial instruction, advice or wish"). If an affirmative answer does not appear, it is clear that the separation has been breached. The breach is not capable of repair by the Chapter III judge on whom the function is purportedly conferred, for the breach invalidates the conferral of the function. If the function is one which must be performed independently of any non-judicial instruction, advice or wish, a further question arises: Is any discretion purportedly possessed by the Chapter III judge to be exercised on political grounds - that is, on grounds that are not confined by factors expressly or impliedly prescribed by law? In considering these questions, it will often be relevant to note whether the function to be performed must be performed judicially, that is, without bias and by a procedure that gives each interested person an opportunity to be heard and to deal with any case presented by those with opposing interests. An obligation to observe the requirements of procedural fairness is not necessarily indicative of compatibility with the holding of judicial office under Chapter III, for many persons at various levels in the executive branch of government are obliged to observe those requirements. But, conversely, if a judicial manner of performance is not required, it is unlikely that the performance of the function will be performed free of political influence or without the prospect of exercising a political discretion.