Satyavratasmriti 1.11: Nirṇayasindhu · Vidhānapārijāta

1.11

mṛto deśāntaragato bhartā strī yady asaṃskṛtā | devaro vā gurur vāpi vaṃśyo vāpi samācaret

If the husband dies having gone to another land and the wife is without [cremation] rites, / the husband's brother, an elder, or a kinsman should perform [them].

If the husband has died abroad and the wife is not consecrated (by the parting of the hair), the husband's brother, the teacher or a kinsman should perform (the rite).