Penal Code § 284
CHAPTER 5. Bigamy, Incest, and the Crime Against Nature
Every person who knowingly and willfully marries or enters into a registered domestic partnership with the spouse of another, in any case in which such spouse would be punishable under the provisions of this chapter, is punishable by a fine not less than five thousand dollars ($5,000), or by imprisonment pursuant to subdivision (h) of Section 1170.