(a) All real or personal property owned by any church and held for, or used for, commercial, business, rental, or investment purposes, or purposes other than church purposes, shall be listed for assessment. The ad valorem tax shall be paid thereon at the same rate and at the time and in the same manner provided by law for any other property owner.
(b) However, in the event any property is used partially for church purposes and partially for investments or other commercial or business purposes, the property shall be exempt from the ad valorem tax.