Tex. Parks & Wild. Code § 49.003

A person in possession of a raptor under a license issued by another state who intends to establish residency in this state must apply to the department for a falconry permit not later than the 10th day after the date the person first moves a raptor into this state. A signed and notarized affidavit stating the person's intent to establish residency in this state must accompany the application.