"Subsequent to the previous attacking Core 1 POB announcement please now note further changes regarding time interval prior to attack and the duration of how long a declaration remains active.
A Core 1 POB attack must have an attack declaration post at least 8 hours prior to an attack.
A Core 2 or above POB attack must have an attack declaration post at least 24 hours prior to an attack.
Attack declaration posts are valid for two weeks after posting. "