
The authors present the issue of the validity of the provisions of the X (10th) volume of the Collection of Laws of the Russian Empire in the eastern provinces of the Republic of Poland during the period of independence between World War I and World War II. In those territories occurred an interesting phenomenon of applying regulations introduced by a state that had lost its legal existence. Despite attempts to unify or codify the provisions, Russian civil law provisions were in force throughout the entire period of Polish interwar independence. Civil law practitioners and theorists made successive attempts to collect these provisions in a way that enabled them to be used. Moreover, these provisions were taught at the Stefan Batory University in Vilnius.