(a) Prior to seeking concurrent use, an application for registration on the Principal Register under the Act must assert use in commerce and include all the application elements required by the preceding sections, in addition to § 2.44 or § 2.45 , if applicable. (b) The applicant must also include a verified statement that indicates the following, to the extent of the applicant's knowledge: (1) For a trademark or service mark, the geographic area in which the applicant is using the mark in commerce;