Constitutional custom and praxis in the federal and State levels dictate that, in cases when the head of the Executive Branch is unable to discharge the office for health reasons, temporary incapacity can be self declared by means of an executive message addressed to the Legislature; in such cases, the chief executive can reassume his powers by means of a further message to the Legislative Branch in which he declares that the temporary impediment has ceased and that he is thus resuming the duties of his office.