California Code, Code of Civil Procedure - CCP § 2027.010

(a) Any party may obtain discovery by taking an oral deposition, as described in Section 2025.010, in a foreign nation. Except as modified in this section, the procedures for taking oral depositions in California set forth in Chapter 9 (commencing with Section 2025.010) apply to an oral deposition taken in a foreign nation.

(b) If a deponent is a party to the action or an officer, director, managing agent, or employee of a party, the service of the deposition notice is effective to compel the deponent to attend and to testify, as well as to produce any document, electronically stored information, or tangible thing for inspection, copying, testing, or sampling.

(c) If a deponent is not a party to the action or an officer, director, managing agent or employee of a party, a party serving a deposition notice under this section shall use any process and procedures required and available under the laws of the foreign nation where the deposition is to be taken to compel the deponent to attend and to testify, as well as to produce any document, electronically stored information, or tangible thing for inspection, copying, testing, sampling, and any related activity.

(d) A deposition taken under this section shall be conducted under the supervision of any of the following:

(e) On motion of the party seeking to take an oral deposition in a foreign nation, the court in which the action is pending shall issue a commission, letters rogatory, or a letter of request, if it determines that one is necessary or convenient. The commission, letters rogatory, or letter of request may include any terms and directions that are just and appropriate. The deposition officer may be designated by name or by descriptive title in the deposition notice and in the commission. Letters rogatory or a letter of request may be addressed: “To the Appropriate Judicial Authority in [name of foreign nation].”