Here's an overview of Chapter 11 :
http://www.hq.com/reorganization/hq_overview.htm
And here's the actual text from the U.S. Code:
http://www4.law.cornell.edu/uscode/11/ch11.html
Section 1113c is of particular interest in the coming days at UAL as management seeks to get labor costs under control with or without approval of the unions.