 Falk was a member of the party's central board, and had influence in the newspaper "Norges Kommunistblad".He also influenced the founding of the short-lived party Arbeiderklassens Samlingsparti.In 1928 he was a part of the 6th World Congress of the Comintern in Moscow, but Falk and "Mot Dag" left the Communist Party in 1928.