An informal meeting before the New Year is a long-standing tradition of the Commonwealth ST. PETERSBURG, December 24. /TASS/. Russian President Vladimir Putin will hold a traditional informal summit of the Commonwealth of Independent States (CIS) in St. Petersburg. All CIS leaders will meet on December 25. An informal meeting before the New Year is a long-standing tradition of the Commonwealth. This year will be no exception. According to Presidential Aide Yury Ushakov, Putin will sum up the