Texas Family Code - FAM § 51.0412. Jurisdiction Over Incomplete Proceedings

(1) the petition or motion was filed while the respondent was younger than 18 or 19 years of age, as applicable;

(2) the proceeding is not complete before the respondent becomes 18 or 19 years of age, as applicable; and

(3) the court enters a finding in the proceeding that the prosecuting attorney exercised due diligence in an attempt to complete the proceeding before the respondent became 18 or 19 years of age, as applicable.