Redistricting authority:  
U.S. Congressional Districts – Legislative.  The House and Governmental Affairs Committee in the House, and the Senate and Government Affairs Committee in the Senate, are in charge of holding hearings after the state receives the U.S. census information.  They draw up legislation and the Governor has veto power over it.  If the process is not completed within one year after census data has been reported, the state Supreme Court can reapportion both Houses.  Also, the Supreme Court gets involved if an elector petitions them to become involved. 

Governor has veto power over plan.

State Legislative Districts – Legislative. Same as above.