334.2—Application for naturalization.
(a)
An applicant may file an application for naturalization by filing a completed Form N-400 signed in the applicant's own handwriting, if physically able to do so, and by including any other documents required by parts 316, 319, 324, 325, 327, 328, 329, and 330 of this chapter, as appropriate. An application prepared for a person physically unable to write shall be signed by the preparer, in the space marked “Preparer's signature.” The applicant shall include the fee as required in § 103.7 of chapter B of this title, and a photocopy of the applicant's Alien Registration Card (Form I-551).
(b)
An application for naturalization may be filed up to 90 days prior to the completion of the required period of residence, which may include the three-month period of residence required to establish jurisdiction under section 316(a) or 319(a) of the Act.