Whether there is a human law?

Objections

Objection 1 : It would seem that there is not a human law. For the natural law is a participation of the eternal law, as stated above (Article [2]). Now through the eternal law "all things are most orderly," as Augustine states (De Lib. Arb. i, 6). Therefore the natural law suffices for the ordering of all human affairs. Consequently there is no need for a human law.
Objection 2 : Further, a law bears the character of a measure, as stated above (Question [90], Article [1]). But human reason is not a measure of things, but vice versa, as stated in Metaph. x, text. 5. Therefore no law can emanate from human reason.
Objection 3 : Further, a measure should be most certain, as stated in Metaph. x, text. 3. But the dictates of human reason in matters of conduct are uncertain, according to Wis. 9:14: "The thoughts of mortal men are fearful, and our counsels uncertain." Therefore no law can emanate from human reason.