Yep, if the criteria is benefits for those who cannot legally marry, then they have to accept polygamist domestic partners, underage domestic partners, animal domestic partners, 1st cousin domestic partners, and any other partner. It is also most likely illegal to exclude those who choose not to get married. It's their right to choose and not be discriminated against.
My 13 year old Coondog is in need of some medical treatment, and well since she has been with me since her whelping and I can't marry her this must mean I can add her to my insurance as a domestic partner. After all she is a Domestic Animal.
Thank god for open minded Educators.