The Eugene Charter provision related to redistricting is general and states:
Section 33. Wards. The council shall divide the city into wards and redefine the boundaries thereof as necessary to accord persons in the city the equal protection of the laws. No person may vote at a city election in a ward other than that in which he or she resides.
The U.S. Census counts every resident in the United States. This is mandated by Article I, Section 2 of the Constitution and takes place every 10 years. The data collected by the decennial census determine the number of seats each state has in the U.S. House of Representatives and is also used to distribute billions in federal funds to local communities. The Census Bureau is required by federal law to provide population counts to states by April 1, 2021, however this has been delayed to September 30, 2021.
The role of the census in maintaining representative government is strong. Apportionment of the U.S. Congress is only half of the process of distributing political power. Virtually all states rely on the census numbers for the redrawing of political districts within the states after apportionment. The Census Bureau has a responsibility to "work closely" with officials in the individual states before each census and to provide summary data for local areas such as election precincts and wards. These areas are the essential building blocks for creating new districts and wards.