(1) An acknowledgment of parentage and a denial of parentage may be contained in a single document or may be in counterparts and may be filed with the state registrar of vital statistics separately or simultaneously. If filing of the acknowledgment and denial both are required under this chapter, neither is effective until both are filed.

(2) An acknowledgment of parentage or denial of parentage may be signed before or after the birth of the child.

(3) Subject to subsection (1) of this section, an acknowledgment of parentage or denial of parentage takes effect on the birth of the child or filing of the document with the state registrar of vital statistics, whichever occurs later.

(4) An acknowledgment of parentage or denial of parentage signed by a minor is valid if the acknowledgment complies with this chapter.