No power but from God: and those that are, are ordained of God
Catechism on Usury, St. Thomas Aquinas
Moreover, it can be well argued this information, though it serves a highly invaluable purpose, may be too involved for this person or that person or family to practically apply without undergoing far more change, hardship and persecution than either they can or should reasonably bear.
To the matter at hand: The Common Law of the Land
It is usual for public officers to take an oath to uphold the law, obey lawful authority and serve the common good. The following is from one of the Common Wealth countries:
These are the members of the territorial police forces in England and Wales which are responsible for general policing . The Police Reform Act 2002 requires the constable of a territorial police force to take the following oath:
England and Wales - Constables appointed under the Police Acts, English form:
"I, ... of ... do solemnly and sincerely declare and affirm that I will well and truly serve the Queen in the office of constable, with fairness, integrity, diligence and impartiality, upholding fundamental human rights and according equal respect to all people; and that I will, to the best of my power, cause the peace to be kept and preserved and prevent all offences against people and property; and that while I continue to hold the said office I will to the best of my skill and knowledge discharge all the duties thereof faithfully according to law."
St. Matthew 22:36-40: "Master, which is the greatest commandment in the law? Jesus said to him: Thou shalt love the Lord thy God with thy whole heart, and with thy whole soul, and with thy whole mind. This is the greatest and the first commandment. And the second is like to this: Thou shalt love thy neighbour as thyself. On these two commandments dependeth the whole law and the prophets."
An example of such unlawful legislation is the Amendment to the US Constitution which states: "Congress shall make no law respecting an establishment of religion". Notwithstanding the inalienable rights which are guaranteed by the Constitution (NOT granted, but guaranteed) the Constitution of the Unites States denies the Church her God given right as the religion of the State and in this regard is both heretical and schismatic. It is unlawful.
When Caesar usurps the honour that ought to be paid to God, the lawful channel of obedience has been ruptured. For is we give to Caesar what is truly his, then we give him something he has not stolen. But God gives Caesar freely the power to rule, but in no way is this licence to sin, nor is it a gift that cannot be revoked.
Therefore, when it is clear that the powers that be have no longer any lawful claim to authority, those who would then claim and exercise authority must do so only in accordance with the laws of God.
Maxim in Law: "Ignorance of the Law does not excuse misconduct in anyone, least of all a sworn officer of the law."
Romans 2:11-13: "For there is no respect of persons with God. For whosoever have sinned without the law, shall perish without the law; and whosoever have sinned in the law, shall be judged by the law. For not the hearers of the law are just before God, but the doers of the law shall be justified"
Since all are equal before the law, then, it follows that all are entitled, by nature, to life, freedom and a necessary share of the goods of the earth, in accordance with true justice and in such proportion as that they should be able to fulfill the command given to fill the earth.