(1) If adopting a general fund budget that is less than or equal to the ensuing year's maximum general fund budget and is within limits of 20-9-308 , MCA, the trustees of a district must obtain voter approval for any dollar increase in the over-BASE levy budgeted for the current year.

(2) Except as provided in (3) , if adopting a general fund budget that exceeds the ensuing year's maximum general fund budget and is within limits of 20-9-308 , MCA, the trustees must obtain voter approval for any amount budgeted above the ensuing year's maximum budget.

(3) For FY 2005-06 and FY 2006-07, the trustees adopting a general fund budget that exceeds the ensuing year's maximum general fund within the limits of 20-9-308 , MCA, must obtain voter approval for the amount budgeted above the greater of:

(a) the ensuing year's maximum budget; or

(b) the sum of the BASE, plus the previous year's over-BASE levy amount, plus the fund balance reappropriated available to fund the over-BASE budget, plus the prior year's excess reserves used to fund the over-BASE budget, plus the estimated tuition revenues used to fund the over-BASE.