(a) A voluntary declaration of parentage is void if, at the time of signing, any of the following are true:

1. (1) A person other than the woman who gave birth to the child or a person seeking to establish parentage through a voluntary declaration of parentage is a presumed parent under Section 7540 or subdivision (a), (b), or (c) of Section 7611.
2. (2) A court has entered a judgment of parentage of the child.
3. (3) Another person has signed a valid voluntary declaration of parentage.
4. (4) The child has a parent under Section 7613 or 7962 other than the signatories.
5. (5) The person seeking to establish parentage is a donor pursuant to Section 7613.
6. (6) The person seeking to establish parentage asserts that the person is a parent under Section 7613 and the child was not conceived through assisted reproduction.