Vermont Constitution Ch. II, § 73. Manner of apportionment of the general assembly

The General Assembly shall establish senatorial districts within and including all of the state, and shall further establish representative districts within and including all of the state.

At the biennial session following the taking of each decennial census under the authority of Congress, and at such other times as the General Assembly finds necessary, it shall revise the boundaries of the legislative districts and shall make a new apportionment of its membership in order to maintain equality of representation among the respective districts as nearly as is practicable. The General Assembly may provide for establishment of a legislative apportionment board to advise and assist the General Assembly concerning legislative apportionment. If the General Assembly fails to revise the legislative districts as required in this section, the Supreme Court in appropriate legal proceedings brought for that purpose may order reapportionment of the districts.