The legal system of independent Lithuania between the World Wars was influenced by the fact that three separate systems of civil law governed various parts of the country, while the autonomous Klaipėda Region had its own legal instruments. The notable difference from the rest of the state was the possibility of a secular civil marriage in the 1930s and 1940s. The drafting of Lithuanian legal codes went on for decades and was not completed until World War II. During the Soviet occupation the adapted law of the USSR was in force in Lithuania.