The process for creating a law in game can be read in the Law-making supplement on atitd.com . In short, a petition is written up at a University of Leadership, signatures are collected, it's resubmitted at any University of Leadership, and then it's either put up for a vote if it's a legal issue, or it is submitted into the atitd.info features discussion if it is a feature request.
(This list is now in alphabetical order to facilitate easier reading)