If the community is 55 or older in most cases at least one occupant has to be 55 or older.
If your daughter has a spouse who is 55 or older in these cases she will be ok.
Some communities are more strict and NO one under 55 may reside.
Best to check the rules of your community before you do anything.
Best of luck to you!!!
Kawain Payne, Realtor
Prudential California Realty