(2) The aggregate amount of bonded indebtedness incurred for the benefit of a district or a service area or combination of service areas, when added to the aggregate amount of other bonded indebtedness payable from ad valorem property taxes levied within the district or the service area or combination of service areas, may not exceed one and one-half percent of the real market value of all taxable property within the district or the affected service area or service areas, computed in accordance with ORS 308.207. [1995 c.357 §8; 2009 c.577 §5; 2013 c.721 §3]