This document just came to my attention (revised March 2017). I could not find it by navigating LSAC; I only found it through this link: https://www.lsac.org/docs/default-source/publications-(lsac-resources)/statementofgoodadm.pdf and through google.
They represent "a set of understandings and standards among member schools regarding best admission practices." I do not know how binding they actually are.
Interesting provisions include:
"Member law schools should:
xxx
request commitments of any kind only from admitted applicants no earlier than April 1, except under binding early decision plans or for academic terms beginning in the spring or summer;
xxx
request commitments of any kind from admitted students to accept an offer of institutional aid no earlier than April 1, except under binding early decision plans or for academic terms beginning in the spring or summer; xxx
xxx
allow applicants to freely accept a new offer from a law school even though a scholarship has been accepted, a deposit has been paid, or a commitment has been made to another school;
xxx
provide financial aid awards to admitted students who have submitted a timely financial aid application, before requesting any commitment; xxx"
This means that schools shouldn't ask you to accept a financial aid offer, or an offer of admission, before April 1. They should also decide on an application for financial aid before requiring you to commit.
FYI
Edit: last paragraph
Edit: added quotation marks
[Edited by Shubidupdup on Mar 06, 2018]