I think that Creon would completely agree with the statement. There is little in it with which he would disagree. I think that Creon would be entirely supportive of the idea that citizens' duty is to follow authority and the laws that stem from it. In this, Creon would feel comfort because the statement does not necessarily endorse civic activism that advocates dissent. Creon's entire attitude in the drama is that the laws and justice are one in the same. In this, he stresses that institution, authority, and power are all interconnected. His disagreement with Antigone rests on this level and the quote makes the argument that all three are the same.
I think that Antigone would disagree with this in the second part of the statement. If citizens do feel compelled to disagree with authority, to obey it is an act of betrayal. It is here where I think that her disagreement is active, something that the quote denies. In this, Creon would voice nothing but disagreement. It is interesting to note that while Creon would agree with the statement, he recognizes his own stubbornness at the end of the drama, albeit too late to avert the tragedy in his home. This might make him adopt a bit of a different perspective on the quote, in recognition of how his belief in the statement actually ended up costing him so much.