8 CFR § 319.3 - Surviving spouses of United States citizens who died during a period of honorable service in an active duty status in the Armed Forces of the United States.
(1) Establish that his or her citizen spouse, child, or parent died during a period of honorable service in an active duty status in the Armed Forces of the United States and, in the case of a surviving spouse, establish that he or she was living in marital union with the citizen spouse, in accordance with 8 CFR 319.1(b), at the time of the citizen spouse's death;
(4) Comply with all other requirements for naturalization as provided in 8 CFR 316, except for those contained in 8 CFR 316.2(a)(3) through (6).
(b)Remarriage of the surviving spouse. The surviving spouse of a United States citizen described under paragraph (a)(1) of this section remains eligible for naturalization under section 319(d) of the Act, even if the surviving spouse remarries.