Property I
Four Unities
Unity of Time
Interest must be acquired by both tenants at the same time.
Unity of Title
The interests held by the co-owners must arise out of the same instrument.
Unity of Interest
Both tenants must have the same interest in the property.
Both must have the same type of interest, and the interest must run for the same duration.
Unity of Possession
Both tenants must have the right to possess the whole property.