(a) Scope. Parties may obtain discovery regarding any matter, not privileged or exempted under the Texas Rules of Civil Evidence, the Texas Rules of Civil Procedure, or other law or rule, that is relevant to the subject matter in the proceeding. Discoverable matters include the existence, description, nature, custody, condition, location and contents of any documents, including papers, books, accounts, drawings, graphs, charts, photographs, maps, email, audio or video recordings, and any other data compilations from which information can be obtained and translated, if necessary, by the person from whom information is sought, into reasonably usable form, and any other tangible things which constitute or contain matters relevant to the subject matter in the action, and the identity and location of persons having any knowledge of any discoverable matter. Discovery is not limited to tangible things, but may extend to knowledge, mental impressions, and opinions of persons who will testify; explanations of documents or tangible things, or information contained therein; and other relevant information within the knowledge or control of the entity from whom discovery is sought. A person is not required to produce a document or tangible thing unless it is within that person’s constructive or actual possession, custody, or control. A person has possession, custody or control of a document or tangible thing as long as the person has a superior right to compel the production from a third party and can obtain possession of the document or tangible thing with reasonable effort.
(b) Discovery methods. Parties may obtain discovery by requests for information, which include requests for inspection or production of documents or things, requests for admissions, and depositions by oral examination.
(c) Stipulations regarding discovery procedure. The parties may, by written agreement:
  (1) provide that depositions may be taken at any time or place, upon any notice, and in any manner and when so taken may be used like other depositions;
  (2) agree to extensions of time in which to respond to or object to a discovery request; and
  (3) modify the procedures provided by this chapter for other methods of discovery.

Source Note: The provisions of this §22.141 adopted to be effective November 1, 1993, 18 TexReg 6641; amended to be effective December 4, 2016, 41 TexReg 9472