Copied from NZ ATPL hours requirements thread
http://www.pprune.org/forums/showthread.php?t=323035
Part 61.31 (b) says that one of the requirements for logging command practice is
(6)the pilot-in-command designated to supervise the co-pilot has certified an appropriate entry in the co-pilot's logbook,or a permanent record of the flight has been made by the operator.
Anyone feel like looking up the ICUS definitions for FAA, JAA ?