The following link is to the Harvard LL.M. program's Student Handbook for 2012 - 2013.
Click here for the Harvard LL.M. Program Student Handbook.
Check with the admissions office of LL.M. programs that interest you, and ask for a copy of their Student Handbook. If the LL.M. program that interests you does not have a Student Handbook, or if that program is unwilling to share their Student Handbook with you, then you might consider choosing a different U.S. law school for your LL.M. degree.