Romans 7:1,2 - The Law is binding on a person only as long as he lives

7:1

The Law told them how to live, told them what they should be doing. That was the principle of the Law. Here is what you should and should not do, now do it. If they obeyed the Law they would be blessed, if they failed then they would be punished. Paul is now telling them that they are no longer living under this system. 

7:2

Paul will now use an analogy with marriage to explain that they are no longer obligated to live as people under the Law. Let me emphasise that “not living under the Law” does not mean that the commands and instructions no longer matter, or are no longer good. Nothing could be further from the truth. It is a matter of how we live. In a marriage the couple are obligated to each other. Paul  puts this in terms of the woman because that more closely reflected the Jewish Law. Under Jewish Law the man could divorce the woman, but not the other way around. However, if the man dies, then the woman is no longer bound.