The full adoption of the child of a spouse, partner bound by a civil solidarity pact or cohabitee is permitted:
1° Where the child has legally established filiation only in respect of that spouse, partner bound by a civil solidarity pact or cohabitee;
2° Where the child has been the subject of a full adoption by that spouse, partner bound by a civil solidarity pact or cohabitee alone and has legally established filiation only in respect of that spouse, partner bound by a civil solidarity pact or cohabitee;
3° Where the parent other than the spouse, partner linked by a civil solidarity pact or cohabitee has had parental authority completely withdrawn;
4° Where the parent other than the spouse, partner linked by a civil solidarity pact or cohabitee is deceased and has left no ascendants in the first degree or where they have manifestly lost interest in the child.