<< Belle Shift Policy >> Policy for Expert shifts and Ph.D students etc. (Approval at the IB and BGM in Nov.2007) . Ph.D student should be an expert shifter. . Ph.D student should take 30 expert shifts [e.g., 10 per year over 3 years, nominally] before writing Ph.D thesis based on Belle data. . Post Doc. is expected to be an expert shifter. . Expert shifters other than Ph.D student should take 4 shifts a year. . When shortage of expert shifters encountered, the shift coordinator can request spokespersons to increase the duty shown above.