(a) Within the United States. (1) In general. Within the United States or a territory or insular possession subject to United States jurisdiction, a deposition must be taken before:

(i) An officer authorized to administer oaths either by federal law or by the law in the place of examination; or

(ii) A person appointed by the Commission or the presiding officer to administer oaths and take testimony.

(b) In a foreign country. (1) In general. A deposition may be taken in a foreign country:

(i) Under an applicable treaty or convention;

(ii) under a letter of request, whether or not captioned a “letter rogatory”;

(iii) On notice, before a person authorized to administer oaths either by federal law or by the law in the place of examination; or

(iv) Before a person authorized by the Commission or the presiding officer to administer any necessary oath and take testimony.

(2) Issuing a letter of request or an authorization. A letter of request, an authorization, or both may be issued:

(i) On appropriate terms after an application and notice of it; and

(ii) Without a showing that taking the deposition in another manner is impracticable or inconvenient.

(3) Form of a request, notice, or authorization. When a letter of request or any other device is used according to a treaty or convention, it must be captioned in the form prescribed by that treaty or convention. A letter of request may be addressed “To the Appropriate Authority in [name of country].” A deposition notice or an authorization must designate by name or descriptive title the person before whom the deposition is to be taken.

(4) Letter of request—admitting evidence. Evidence obtained in response to a letter of request need not be excluded merely because it is not a verbatim transcript, because the testimony was not taken under oath, or because of any similar departure from the requirements for depositions taken within the United States.

(c) Disqualification. A deposition must not be taken before a person who is any party's relative, employee, or attorney; who is related to or employed by any party's attorney; or who is financially interested in the action. [Rule 202.]