Michigan's Petition for Membership in the Streamlined Sales and Use Tax Agreement and Michigan's Certificate of Compliance were posted to the Michigan Department of Treasury website as of January 31, 2005, and were filed with the Co-Chairs of the Streamlined Sales Tax Implementing States on January 31, 2005. On July 31, 2009 the State Treasurer submitted Michigan's re-certification letter to the Executive Director of the Streamlined Sales Tax Governing Board. On July 31, 2009 Michigan submitted a revised Taxability Matrix and the revised Certificate of Compliance to the executive director of the Streamlined Sales Tax Governing Board.