1. For communication with foreign or civilian vessels the International Code of Signals is used. 2. One-way restrictions are triggered by severe weather conditions ( COLREGS and the International Code of Signals . 3. This new international code of signals was officially brought into force worldwide on 1 January 1934. 4. The new international code of signals was officially brought into force worldwide on 1 January 1934. 5. The Commercial Code of Signals, c . 1900, was modified to become the International Code of Signals . 6. The Commercial Code of Signals , c . 1900, was modified to become the International Code of Signals. 7. The new code of signals received the approval of the Ministry of Public Labour on 1 August 1930. 8. The IMO is also responsible for publishing the International Code of Signals for use between merchant and naval vessels. 9. The Russian Navy Code of Signals originates from a similar code of signals used by the Imperial Russian Navy. 10. The Russian Navy Code of Signals originates from a similar code of signals used by the Imperial Russian Navy.