(a) An applicant, registrant, or party to a proceeding whose domicile is not located within the United States or its territories must be represented by an attorney, as defined in § 11.1 of this chapter, who is qualified to practice under § 11.14 of this chapter. The Office cannot aid in the selection of an attorney. (b) The Office may require an applicant, registrant, or party to a proceeding to furnish such information or declarations as may be reasonably necessary to the proper determination of