Section 1A. Tenants by the entirety holding under a deed dated prior to February eleventh, nineteen hundred and eighty may elect to have their tenancy treated as being subject to the provisions of chapter seven hundred and twenty-seven of the acts of nineteen hundred and seventy-nine; provided, however, that such election is made in writing, identifying the real estate with reference to the book and page of the registry of deeds wherein such deed is filed. Such election shall be executed by the grantees named as tenants by the entirety on the deed who are electing to be subject to this section, duly notarized, and recorded in said registry.