 In June 1943, Lef Nosi joined the Balli Kombëtar and became a leading figure of the collaboration with Fascist and Nazis.In October 1943, during the German occupation, he was chosen as president of the national assembly and was elected to the High Regency Council(Keshilli i Larte i Regjences).The assembly under Nosi passed a series of decrees that fundamentally altered Albanian's Italian-established constitution.