less, or even careless, misstatements, as when they are knowingly untrue; in each case the result is falsified, and therefore the mischief may be equally provided against if Parliament thinks fit. Even when nothing is conveyed but advice or opinion, the identity of the person proffering it, if not withheld, might for various reasons seriously affect its value and weight in the minds of the electors. The testimony of a witness in a Court of Justice might be differently appraised if his true personality were undis- closed, or if, on the other hand, his interest, his experience, and, possibly, his past career, were placed before the jury.
Not less important may be the personality of those who by the most extensive and effective means known to society disseminate in a great national controversy their assertions of facts, opinions, and advice, for the very purpose of influencing the result. We have here to consider the question of power merely, not expedi- ency, and whether it be advantageous or not to enact this law, is beyond our province to discuss. It is, of course, conceded the Commonwealth Parliament has plenary power over federal elec- tions. But plenary power is incapable of restraint; and it is a mere lip loyalty to principle, if, while acknowledging the doctrine, it be assiduously sought to defeat its application. The limits of plenary power end only with the subject matter in respect of which it may be exercised. If the purity and reality of elections be within the ambit of the power, if in the public interest the electors may be protected from the open assaults of force and threats and corruption, it is impossible to exclude the right also to guard them against the more insidious, and, in many respects, the more dangerous form of winning their assent by acts appar- ently fair and disinterested, but which may be SO only on the surface.
If, then, there were nothing in the nature of precedent, the reason of the matter would be sufficient to sustain the enactment. But there is abundant precedent, and as the question arises on the construction of an Imperial Act-the Constitution-I confine myself to instances from Imperial legislation.
The Corrupt and Illegal Practices Prevention Act 1883, sec. 18, provides that Every bill, placard, or poster having reference to an election shall bear upon the face thereof the name and