Texas Family Code - FAM § 162.406. Registration Eligibility

(a) An adoptee who is 18 years of age or older may apply to a registry for information about the adoptee's birth parents and biological siblings.

(b) A birth parent who is 18 years of age or older may apply to a registry for information about an adoptee who is a child by birth of the birth parent.

(c) An alleged father who is 18 years of age or older and who acknowledges paternity but is not, at the time of application, a birth father may register as a birth father but may not otherwise be recognized as a birth father for the purposes of this subchapter unless:

(d) A biological sibling who is 18 years of age or older may apply to a registry for information about the person's adopted biological siblings.

(e) Only birth parents, adoptees, and biological siblings may apply for information through a registry.

(f) A person, including an authorized agency, may not apply for information through a registry as an agent, attorney, or representative of an adoptee, birth parent, or biological sibling.