CAL. FAM. CODE § 2201 : California Code - Section 2201

(a) A subsequent marriage contracted by a person during the life of a former husband or wife of the person, with a person other than the former husband or wife, is illegal and void from the beginning, unless:

(1) The former marriage has been dissolved or adjudged a nullity before the date of the subsequent marriage.

(2) The former husband or wife (i) is absent, and not known to the person to be living for the period of five successive years immediately preceding the subsequent marriage, or (ii) is generally reputed or believed by the person to be dead at the time the subsequent marriage was contracted.

(b) In either of the cases described in paragraph (2) of subdivision (a), the subsequent marriage is valid until its nullity is adjudged pursuant to subdivision (b) of Section 2210.