2005 California Family Code Sections 2200-2201 CHAPTER 1. VOID MARRIAGE

2200.  Marriages between parents and children, ancestors and
descendants of every degree, and between brothers and sisters of the
half as well as the whole blood, and between uncles and nieces or
aunts and nephews, are incestuous, and void from the beginning,
whether the relationship is legitimate or illegitimate.
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.