Redistricting authority:  
U.S. Congressional Districts – Legislative.  The constitution and legislation is silent on congressional reapportionment, but the Legislature in Michigan carries out this task.

The Legislature has the duty to enact a redistricting plan for the Senate and House of representatives by November 1, 2010.  The act will go into effect 90 days from the end of session it was redistricting plan has not be established before November 1, 2010, a political party, the speaker of the House, pleading plan. The Supreme Court must make their plan publicly available for 30 days before hearings occur on it. A hearing must occur by March 10, 2011.  A redistricting plan must be filed by the Supreme Court by April 1, 2011, so that legislators can meet residency requirements.

State Legislative Districts – Legislative. The Legislature has the duty to enact a redistricting
plan for the Senate and House of representatives by November 1, 2010. The act will go into
effect 90 days from the end of session it was passed, but may be given immediate effect if the
Legislature passes it by a 2/3 vote. If a redistricting plan has not be established before November
1, 2010, a political party, the speaker of the House, the minority leader of the House, or the
majority or minority leader of the Senate may file a pleading with the Supreme Court on
November 2 requesting that the Supreme Court prepare a redistricting plan. The Supreme Court
must make their plan publicly available for 30 days before hearings occur on it. A hearing must
occur by March 10, 2011. A redistricting plan must be filed by the Supreme Court by April 1,
2011, so that legislators can meet residency requirements.