IT is likewise "a rule _prescribed_." Because a bare resolution, confined in the breast of the legislator, without manifesting itself by some external sign, can never be properly a law. It is requisite that this resolution be notified to the people who are to obey it. But the manner in which this notification is to be made, is matter of very great indifference. It may be notified by universal tradition and long practice, which supposes a previous publication, and is the case of the common law of England. It may be notified, _viva voce_, by officers appointed for that purpose, as is done with regard to proclamations, and such acts of parliament as are appointed to be publicly read in churches and other assemblies. It may lastly be notified by writing, printing, or the like; which is the general course taken with all our acts of parliament. Yet, whatever way is made use of, it is incumbent on the promulgators to do it in the most public and perspicuous manner; not like Caligula, who (according to Dio Cassius) wrote his laws in a very small character, and hung them up upon high pillars, the more effectually to ensnare the people. There is still a more unreasonable method than this, which is called making of laws _ex post facto_; when _after_ an action is committed, the legislator then for the first time declares it to have been a crime, and inflicts a punishment upon the person who has committed it; here it is impossible that the party could foresee that an action, innocent when it was done, should be afterwards converted to guilt by a subsequent law; he had therefore no cause to abstain from it; and all punishment for not abstaining must of consequence be cruel and unjust[e]. All laws should be therefore made to commence _in futuro_, and be notified before their commencement; which is implied in the term "_prescribed_." But when this rule is in the usual manner notified, or prescribed, it is then the subject's business to be thoroughly acquainted therewith; for if ignorance, of what he _might_ know, were admitted as a legitimate excuse, the laws would be of no effect, but might always be eluded with impunity. [Footnote e: Such laws among the Romans were denominated _privilegia_, or private laws, of which Cicero _de leg._ 3. 19. and in his oration _pro domo_, 17. thus speaks; "_Vetant leges sacratae, vetant duodecim tabulae, leges privatis hominibus irrogari; id enim est privilegium. Nemo unquam tulit, nihil est crudelius, nihil perniciosius, nihil quod minus haec civitas ferre possit_."] BUT farther: municipal law is "a rule of civil conduct prescribed _by the supreme power in a state_." For legislature, as was before observed, is the greatest act of superiority that can be exercised by one being over another. Wherefore it is requisite to the very essence of a law, that it be made by the supreme power. Sovereignty and legislature are indeed convertible terms; one cannot subsist without the other.