37 CFR § 11.8 - Oath and registration fee.
(a) After an individual passes the examination, or the examination is waived, the OED Director shall promptly publish a solicitation for information concerning the individual's good moral character and reputation. The solicitation shall include the individual's name, and business or communication postal address.
(b) An individual shall not be registered as an attorney under § 11.6(a), registered as an agent under § 11.6(b) or (c), or granted limited recognition under § 11.9(b) unless within two years of the mailing date of a notice of passing registration examination or of waiver of the examination the individual files with the OED Director a completed Data Sheet, an oath or declaration prescribed by the USPTO Director, and the registration fee set forth in § 1.21(a)(2) of this subchapter. An individual seeking registration as an attorney under § 11.6(a) must provide a certificate of good standing of the bar of the highest court of a State that is no more than six months old.