Here are many primary documents relating to the Michigan Indian Tuition Waiver.
State Documents
MITW eligibility policy-procedure FINAL
Tribally Generated Documents
Sault Tribe Legal Analysis of MITW — 1995
A Descriptive Study of the Michigan Indian Tuition Waiver Program 1996
Tribal Position Paper to Mich. Civil Rights Commission — Jan. 17, 2007
Other Documents
Lumbees from Robeson v. State of Michigan — consent decree — 1982
Michigan Legislative Services Bureau 2000 Report
Attorney General Opinion No. 6581 — May 1989
Rep. Sak Request to Attorney General for Opinion — March 14, 2007
AG Cox Declining to Issue Opinion on Constitutionality of MITW
Historical Materials
Harold Ickes Letter Jan. 22, 1934
Act of Congress — Granting Certain Property to the State of Michigan for Institutional Purposes
Turtle Talk 
You might want to add one more document:
THE PRE-LEGISLATIVE HISTORY OF THE MICHIGAN INDIAN TUITION WAIVER ©1998 Martin J. Reinhardt
Abstract: This study focuses on the pre-legislative history of the Michigan Indian Tuition Waiver (MITW). Much of the relevant history for this analysis of Public Act 174, of 1976 (The Michigan Indian Tuition Waiver Act) does not exist in document form, but within oral history. Testimonies from individuals involved in the development of the MITW are recorded, analyzed, and juxtaposed with media accounts to complete the pre-legislative history of the MITW. The main research question explored in depth is: What social and legal factors of the late 1960s and early 1970s influenced the development of the MITW? Included in the narrative are sections that focus on important social and legal considerations in the development of the MITW. This thesis will be useful for legislators and other makers of public policy, especially those involved in the administration of the MITW.