RSA 170-B:4 Who May Adopt.

Any of the following adults may adopt:
I. Two adults together.
II. An unmarried adult.
III. The unmarried parent of the adoptee.
IV. A married adult without that person's spouse joining as a petitioner, if the adoptee is not the petitioner's spouse; and if any one of the following circumstances apply:
(a) The petitioner's spouse is a parent of the adoptee and assents to the adoption;
(b) The petitioner and the petitioner's spouse are legally separated;
(c) The failure of the petitioner's spouse to join in the petition is excused by the court by reason of prolonged unexplained absence, unavailability, or circumstances constituting an unreasonable withholding of assent; or
(d) The petitioner's spouse assents to the adoption and the adopt