Code used to tell a friend that you are going to take a piss (971) or a shit (972). Sections also exist to define the length of time of the said procedure.
Friend 1: yo man why you got that look on your face...
You: Man i gotta take a Code-972 major
Girlfriend: You boys and your lingo.
Friend 1: haha she doesnt know what the hell we are talking about.
You: Yea man actually its gonna have to be a section 25
Friend 1: DAMN!...BOI
Code-971 / Code-972, the choice is up to you