(a) "Parent" means the mother, a man presumed to be the father, a man legally determined to be the father, a man who has been adjudicated to be the father by a court of competent jurisdiction, a man who has acknowledged his paternity under applicable law, or an adoptive mother or father. Except as provided by Subsection (b), the term does not include a parent as to whom the parent-child relationship has been terminated.(b) For purposes of establishing, determining the terms of, modifying, or enforcing an order, a reference in this title to a parent includes a person ordered to pay child support under Section 154.001(a-1) or to provide medical support or dental support for a child.Amended by Acts 2015, Texas Acts of the 84th Leg. - Regular Session, ch. 1150,Sec. 5, eff. 9/1/2018.Amended By Acts 2005, 79th Leg., Ch. 268, Sec. 1.03, eff. 9/1/2005.Amended By Acts 2001, 77th Leg., ch. 821, Sec. 2.05, eff. 6/14/2001.Amended by Acts 1999, 76th Leg., ch. 556, Sec. 1, eff. 9/1/1999Added by Acts 1995, 74th Leg., ch. 20, Sec. 1, eff. 4/20/1995.