When any person is seized or possessed of any estate of joint tenancy at the time of his death, the joint tenancy is deemed to have been severed by the death of the joint tenant and the estate is distributable as a tenancy in common unless the instrument which creates the joint tenancy, including any instrument in which one person conveys to himself and one or more other persons, or two or more persons convey to themselves, or to themselves and another or others, expressly provides for a right of survivorship, in which case the severance does not occur. While other methods for the creation of a joint tenancy may be utilized, an express provision for a right of survivorship is conclusively deemed to have occurred if the will or instrument of conveyance contains the names of the devisees or grantees followed by the words "as joint tenants with right of survivorship and not as tenants in common".

PART 9. DELIVERY AND SUPPRESSION OF WILLS