Change of the legal regime of the real property as the special case of frustration of purpose of the contract in Russian law

The author analyzes changes in the legal regime of real estate objects, primarily land plots, during the period of the contract concluded with respect to such objects, and its impact on contractual legal relations. The signs of the legally significant purpose of the treaty are formulated, the falling off of which may entail the dissolution (change) of the contract. The author proposes to consider such a change in the legal regime of real estate as a special case of a significant change in circumstances - the fallout of the purpose of the treaty.