<Dt> Unity of marriage </Dt> <Dd> In order for there to be a tenancy by the entirety this fifth unity must be present . Marriage combined with the preceding four unities creates a tenancy by the entirety . A tenancy by the entirety gives rise to certain legal rights, such as rights of survivors, when one spouse is deceased that interest automatically passes to the surviving spouse . </Dd> <Dl> <Dt> Unity of unison </Dt> <Dd> In order for the parties to be united, they must be in unison . This has been criticised by the Law Commission in their 283rd report, entitled' Unity in Leaseholds' . </Dd> </Dl> <Dt> Unity of unison </Dt>

The creation of a joint tenancy traditionally requires the conveyance of four unities which are