Whether promulgation is essential to a law?

Objections

Objection 1 : It would seem that promulgation is not essential to a law. For the natural law above all has the character of law. But the natural law needs no promulgation. Therefore it is not essential to a law that it be promulgated.
Objection 2 : Further, it belongs properly to a law to bind one to do or not to do something. But the obligation of fulfilling a law touches not only those in whose presence it is promulgated, but also others. Therefore promulgation is not essential to a law.
Objection 3 : Further, the binding force of a law extends even to the future, since "laws are binding in matters of the future," as the jurists say (Cod. 1, tit. De lege et constit. leg. vii). But promulgation concerns those who are present. Therefore it is not essential to a law.