Synopsis As Introduced Proposes to amend the Legislature Article of the Illinois Constitution. Removes the requirement for each Legislative District to be divided into 2 Representative Districts. Modifies provisions concerning legislative redistricting. Provides specified requirements for each Legislative District, Representative District, and Congressional District for redistricting purposes. Replaces the current method of legislative redistricting with a 17-member Commission, appointed by the Chief Justice of the Supreme Court and the most senior Supreme Court Justice of a different political party in accordance with specified criteria. Specifies requirements for the Commission concerning redistricting plans. Adds provisions concerning the membership of the Commission and budgetary matters related to the Commission. Provides the Supreme Court with original and exclusive jurisdiction over redistricting matters. Defines terms. Makes conforming and other changes. Effective upon being declared adopted and applicable to redistricting beginning in 2021 and to the election of General Assembly members beginning in 2022.