(1) to the beneficiary or beneficiaries, if any, lawfully designated by such officer or employee; or
(2) if there be no such designated beneficiary or beneficiaries, to the following first person or persons who are alive on the date title to the payment arises—
(A) to the widow or widower;
(B) if there be neither of the above, to the child or children in equal shares, with the share of any deceased child distributed among the descendants of that child;
(C) if there be none of the above, to the parents in equal shares or the entire amount to the surviving parent; or
(D) if there be none of the above, to the duly appointed legal representative of the estate of the deceased employee, or if there be no such representative, to the person or persons determined to be entitled thereto under the laws of the domicile of the deceased employee.