The answer to all of your question is "age 18" (voting age).
>> California State Senate and California State Representative:
The minimum age requirement for representatives to sit in both houses
(Senate and Assembly) of the California Legislature is 18 years.
"The federal government and all states except Nebraska have a
bicameral legislature, a legislature divided into two houses; in
California these are the state Senate and the state Assembly."
What are the legal requirements for a candidate to run for a set in
"Any U.S. citizen 18 years of age or older who has been a California
resident for three years and a resident of a legislative district for
one year immediately preceding an election is eligible to hold
legislative office. Legislators are elected on a partisan ballot."
"A candidate shall:
A. Be a U.S. citizen. Cal. Const. Art. V, §21
B. Be a registered voter and otherwise qualified to vote for that
office at the time that nomination papers are issued to the person.
C. Satisfy the following registration requirements:
1. Partisan Candidates
Be registered with the political party whose nomination he or she is
seeking for not less than three months immediately prior to the time
the declaration of candidacy is presented to the county elections
official or, if eligible to register for less than three months, for
as long as he or she has been eligible to register to vote in
2. Independent Candidates Not have been registered as affiliated with
any qualified political party within three months immediately prior to
the time the declaration of candidacy is presented to the county
elections official. §8550(f)
D. Not have served two terms in the office sought since November 6, 1990."
Given that a minimum age is not specified, one can assume that the
minimum voting age (see B) of 18 is an unlisted qualification.
State Legislation on Voting Age
"Existing law provides that any person who will be at least 18 years
of age at the time of the next election is eligible to register and
vote at that election."
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