In fact, the partners do not even need to register the union at the same time.
Does your partner or partners need to be treated at the same time?
If you test positive, your sexual partners will need treatment.
Do partners need to get along for a business relationship to succeed?
The partners need to retain working capital in the practice.
To avoid this, partners need to work together to meet each other's needs.
You can't leave the bathroom door closed - your partner needs to get in.
Clearly, to achieve progress in the field, the social partners will need to be directly involved.
I don't think that potential partners need to agree on all the fine points of money.
Your partner, children, and other family members may also need time to grieve.