(a) (1) The testimony of witnesses in inter partes cases may be submitted in the form of an affidavit or a declaration pursuant to § 2.20 and in conformance with the Federal Rules of Evidence, filed during the proffering party's testimony period, subject to the right of any adverse party to elect to take and bear the expense of oral cross-examination of that witness as provided under paragraph (c) of this section if such witness is within the jurisdiction of the United States, or conduct cross-examination
(a) Submissions must be made to the Trademark Trial and Appeal Board via ESTTA. (1) Text in an electronic submission must be filed in at least 11-point type and double-spaced. (2) Exhibits pertaining to an electronic submission must be made electronically as an attachment to the submission and must be clear and legible. (b) In the event that ESTTA is unavailable due to technical problems, or when extraordinary circumstances are present, submissions may be filed in paper form. All submissions in paper