Vinaya Requirements for Ordaning Bhikkunis?

Hello Dungeons & Dragons!

I’m working on Therīgāthā, and a funny thing I noticed from Dhammapāla’s commentaries, in that women were required to have the blessings of their fathers, husbands or sons for going forth.

Is there a vinaya basis to this claim? I know that one needs parents’ permission to ordain after Suddhodana’s request to Buddha, but what about husbands and sons?

Thanks a lot!

Bhante Sujato suggested once that the requirement may be merely to inform them (see p 179 and 184 of Bhikkhunī Vinaya Studies). Not sure if any work on this question has been done since.