“Combined overlapping tax rate” means the total ad valorem tax rate levied on a parcel or other taxable unit of property, excluding any portion thereof which is:
1. Exempt pursuant to NRS 361.4726 or subsection 3 of NRS 361.4727 from each partial abatement from taxation provided pursuant to NRS 361.4722, 361.4723 and 361.4724; or
2. Approved and levied pursuant to NRS 361.4728 and exempt from each partial abatement from taxation provided pursuant to NRS 361.4722, 361.4723 and 361.4724.