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The sovereign is the only legislator, and therefore the only source of law, in any State.
The legislator in all Commonwealths is only the sovereign, be he one man, as in a monarchy, or one assembly of men, as in a democracy or aristocracy. For the legislator is he that maketh the law. And the Commonwealth only prescribes and commandeth the observation of those rules which we call law: therefore the Commonwealth is the legislator. But the Commonwealth is no person, nor has capacity to do anything but by the representative, that is, the sovereign; and therefore the sovereign is the sole legislator. For the same reason, none can abrogate a law made, but the sovereign, because a law is not abrogated but by another law that forbiddeth it to be put in execution.
Hobbes, Lev XXVI 5