It does not appear she is "moving" but this may help. Michigan law info:
D. Amendments to Statutes Relating to the Support and Parenting Time Act
2000 PA 422 adds MCL 722.31. This act took effect January 9, 200l.
The act establishes that, where there is joint legal custody, the legal residence of a child whose parental custody is governed by court order is with each parent. A parent cannot change a legal residence of such a child by more than 100 miles unless by court order or consent of the other parent. Exceptions are made where the child's two residences were already more than 100 miles apart or were moved closer by the change. The act lists factors for the court to consider before approving a change of residence over 100 miles. The act makes an exception for a change of residence to protect from a threat of domestic violence.
The act requires that any order determining or modifying custody or parenting time either state the parties' agreement on how a change will be handled or state: "A parent whose custody or parenting time of a child is governed by this order shall not change the legal residence of the child except in compliance with section 11 of the 'Child Custody Act of 1970,' 1970 PA 91, MCL 722.31."
2000 PA 442 amends MCL 552.631 and MCL 552.632. This act took effect April 1, 2001.
Find more about MI family law at:
http://www.icle.org/sections/family/index.htm
or go to the state law resource center on this board