(a) Eligibility. To be eligible for naturalization under section 319(d) of the Act, the surviving spouse, child, or parent of a United States citizen must:

(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;

(2) At the time of examination on the application for naturalization, reside in the United States pursuant to a lawful admission for permanent residence;

(3) Be a person of good moral character, attached to the principles of the Constitution of the United States, and favorably disposed toward the good order and happiness of the United States; and

(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.