Kant then discusses the concept of having "reverence for the law", and acting accordingly. It's worth noting that he is speaking of "law" here not in the legal sense, but rather in the sense that a principle is a law. 

(a) In this section, then, how does he tie together the concepts of "duty" and "the law"? 

(b) What is he suggesting should be guiding moral actions in this regard, or as he says, what constitutes "the moral worth of an action", in relation to "duty" and "the law"?