The Order of the Arcane Council
In an ideal world, there would be no need to have a standing policy on this situation. This is not an ideal world. If the story situation allows for it (at the GM’s discretion), a character whose player misses a session will not be involved in the game session. As such, that character will not receive any XP for that session. If it does not make sense to extract a PC from the session (an extended dungeon crawl, for example), that character will be run by another player. A character’s player has final say on which other players are allowed to run his character.
We should strive to follow errata as best as possible.