(a) To facilitate compliance with this subchapter, the vital statistics unit shall prescribe forms for the:
(1) acknowledgment of paternity;
(2) denial of paternity; and
(3) rescission of an acknowledgment or denial of paternity.
(b) A valid acknowledgment of paternity, denial of paternity, or rescission of an acknowledgment or denial of paternity is not affected by a later modification of the prescribed form.