Quote Originally Posted by Chronos View Post
The only known rule on the subject is that Fireball has a minimum caster level of 5, that being the example used in the text. Any other ruling relies on circular reasoning (you can't cast Haste at a caster level lower than 5, because 5 is the minimum caster level for Haste, and it's the minimum caster level because you can't cast it at a lower level than that).
i have already disproved the one RAW instance though, so again it would be specific trumps general. so only people who have the minimum point of CL5 when they can cast fireball have that restriction.....