Still need to vote in California? Here are the rules on same-day registration on Election Day
Briefly

Eligible Californians can register to vote on Election Day at designated locations, ensuring they can participate, regardless if they missed the previous registration deadline.
California's same-day voter registration allows residents to sign up and cast their vote on Election Day, provided they arrive before polls close at 8 p.m.
To register on Election Day, individuals must present valid ID, which may include a utility bill, passport, driver's license, or other forms of identification.
All eligible voters, including US citizens 18 and over, must ensure they are not ineligible due to incarceration or mental incompetence to partake in voting.
Read at Sacramento Bee
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