(a) Notwithstanding Section 9321, a person who is a resident of this state may file a petition for adult adoption with the court in any of the following:

1. (1) The county in which the prospective adoptive parent resides.
2. (2) The county in which the proposed adoptee was born or resides at the time the petition was filed.
3. (3) The county in which an office of the public or private agency that placed the proposed adoptee for foster care or adoption as a minor or dependent child is located.