Family Code § 5700.315
CHAPTER 3. Civil Provisions of General Application
A party whose parentage of a child has been previously determined by or pursuant to law may not plead nonparentage as a defense to a proceeding under this part.
CHAPTER 3. Civil Provisions of General Application
A party whose parentage of a child has been previously determined by or pursuant to law may not plead nonparentage as a defense to a proceeding under this part.