Texas Family Code - FAM § 160.204. Presumption of Paternity

(1) he is married to the mother of the child and the child is born during the marriage;

(2) he is married to the mother of the child and the child is born before the 301st day after the date the marriage is terminated by death, annulment, declaration of invalidity, or divorce;

(3) he married the mother of the child before the birth of the child in apparent compliance with law, even if the attempted marriage is or could be declared invalid, and the child is born during the invalid marriage or before the 301st day after the date the marriage is terminated by death, annulment, declaration of invalidity, or divorce;

(4) he married the mother of the child after the birth of the child in apparent compliance with law, regardless of whether the marriage is or could be declared invalid, he voluntarily asserted his paternity of the child, and:

(5) during the first two years of the child's life, he continuously resided in the household in which the child resided and he represented to others that the child was his own.

(1) an adjudication under Subchapter G  1;  or

(2) the filing of a valid denial of paternity by a presumed father in conjunction with the filing by another person of a valid acknowledgment of paternity as provided by Section 160.305.