Question: spell prerequisites

[Mortepierre]

If a spell lists a certain magic attack bonus as one of its prerequisites, is it the 'base' bonus or the modified (-> including the Cha mod.) bonus?

 

[Trodax]

Base Magic Attack Bonus. (Without Cha added, that is.)

 

[Mortepierre]

Durn! I thought so but I needed to make sure. Thanks!