What rule in the Code of Chivalry, did Sir Gawain break and cause the Green Knight to mock him?

How does Sir Gawain betray the Lord and break the code of chivalry? He doesn't keep his word. He doesn't give The Lord the sash because he wants to keep it to save his own life.

i don't see how you want other people to do your work for you and it is like you are just handing your assignment to anybody else and having them deal with it instead of your self i thought this site was for asking questions and somebody could you on it not just handing your work to somebody else to deal with it just saying don't mean to be mean just proving a fact.

explanation:

b.

jim crow laws were enacted in northern states.