For the purposes of section 318 of the Act, a notice to appear issued under 8 CFR part 239 (including a charging document issued to commence proceedings under sections 236 or 242 of the Act prior to April 1, 1997) shall be regarded as a warrant of arrest. 8 C.F.R. § 318.1
(a)Public ceremony. An applicant for naturalization who has elected to have his or her oath of allegiance administered by the Service or an Immigration Judge and is not subject to the exclusive oath administration authority of an eligible court pursuant to section 310(b) of the Act shall appear in person in a public ceremony, unless such appearance is specifically excused under the terms and conditions set forth in this part. Such ceremony shall be held at a time and place designated by the Service