Spell Slots Above 9th Level Resulting From Class Levels

[saucercrab]

That is where I have thought it was all along. I've poured over the book looking for it.

Can you let me know the page number?

Oh, my apologies. I thought that you didn't realize what the source was.

Page 289 (the FRCS' index is one of the few good ones Iin a Wizards book).