Texas Code of Criminal Procedure - CRIM P Art. 22.01. Bail forfeited, when

When a defendant is bound by bail to appear and fails to appear in any court in which such case may be pending and at any time when his personal appearance is required under this Code, or by any court or magistrate, a forfeiture of his bail and a judicial declaration of such forfeiture shall be taken in the manner provided in Article 22.02 of this Code and entered by such court.