Final answer:
A joint tenancy is created when certain conditions known as the four unities are met. The unity not required for a joint tenancy to exist is unity of time.
Step-by-step explanation:
A joint tenancy is a form of property ownership where two or more individuals have equal rights to the property. To create a joint tenancy, certain conditions known as the four unities must be met:
- Unity of time: This refers to the requirement that the joint tenants acquire the property at the same time.
- Unity of title: All joint tenants must acquire their ownership interest from the same source or document.
- Unity of possession: Each joint tenant has an equal right to possess and use the property.
- Unity of interest: Each joint tenant has an equal share or interest in the property.
From the given options, the unity that is NOT required for a joint tenancy to exist is unity of time.