[ffcmike]

Currently you do have to speak to the King in order to start further Quests.
It could be a good idea to impose time requirements on activities but preventing Quests from being played for such a length of time would likely cause players to simply lose interest and log off, there might be something else for them to do within this time which wouldn't be a problem for regular players but it's unlikely that new players would have full knowledge of such content.