Family relationships and civil union
A civil union is prohibited between close relatives for moral and physiological reasons. As a result, you cannot form a civil union with a person who is your:
- brother or sister;
- half-brother or half-sister;
- parent or child.
This rule applies to both biological and adoptive relatives.
However, you may form a civil union with certain other relatives, such as:
- your cousin;
- a person who is related to by marriage only, such as the former spouse of your uncle or aunt, or your former sister-in-law.