Tenancy by the entirety The sale in advance of jointly owned building property must be by a written agreement of the joint owners .

共 有 财产 的 全部占有共 有房产的预售，必须有共 有人的书面协议。

The tenancy by the entirety not only need to meet four unities but also to meet the unity of marriage only the couple that compliance with the law can be established this kind of co-ownership .

夫妻一体共有的设立也需要满足四个统一的要件，还要满足婚姻的统一，即只有符合法律规定的夫妻二人才能设立。