Texas Civil Practice and Remedies Code - CIV PRAC & REM § 20.001. Persons Who May Take a Deposition on Written Questions

(a) A deposition on written questions of a witness who is alleged to reside or to be in this state may be taken by:

(b) A deposition on written questions of a witness who is alleged to reside or to be outside this state, but inside the United States, may be taken in another state by:

(c) A deposition on written questions of a witness who is alleged to reside or to be outside the United States may be taken by:

(d) A deposition on written questions of a witness who is alleged to be a member of the United States Armed Forces or of a United States Armed Forces Auxiliary or who is alleged to be a civilian employed by or accompanying the armed forces or an auxiliary outside the United States may be taken by a commissioned officer in the United States Armed Forces or United States Armed Forces Auxiliary or by a commissioned officer in the United States Armed Forces Reserve or an auxiliary of it.  If a deposition on written questions appears on its face to have been taken as provided by this subsection and the deposition or any part of it is offered in evidence, it is presumed, absent pleading and proof to the contrary, that the person taking the deposition as a commissioned officer was a commissioned officer on the date that the deposition was taken, and that the deponent was a member of the authorized group of military personnel or civilians.