State and federal laws provide for voluntary acknowledgment of paternity after the birth of a child. A man is determined to be the natural father of a child if he and the mother acknowledge parentage by filing a written acknowledgment with the vital statistics bureau of the public health division of the department of health, in accordance with the requirements of Article 3 of the New Mexico Uniform Parentage Act.
N.M. Admin. Code § 8.50.107.10