If you go back to the statute, it reads: "The notice must inform the owners of the planned meeting's agenda and specify all items to be voted on, including, but not limited to, all proposed budget items or amendments that will determine the amount of money to be paid by each owner pursuant to subsection 5.

It does read that items to be voted on that will determine the assessments, not what the assessments will be in terms of $. 

Frankly, it looks like how how much detail you go into in the call is a matter of choice. Attorneys and people in general may differ on this question and all be right, as can the legal wrangling that may follow!