Whether human law should be changed in any way?

Objections

Objection 1 : It would seem that human law should not be changed in any way at all. Because human law is derived from the natural law, as stated above (Question [95], Article [2]). But the natural law endures unchangeably. Therefore human law should also remain without any change.
Objection 2 : Further, as the Philosopher says (Ethic. v, 5), a measure should be absolutely stable. But human law is the measure of human acts, as stated above (Question [90], Articles [1],2). Therefore it should remain without change.
Objection 3 : Further, it is of the essence of law to be just and right, as stated above (Question [95], Article [2]). But that which is right once is right always. Therefore that which is law once, should be always law.