In Elmore County, a special indexing fee of one dollar ($1) shall be paid to the county, and collected by its judge of probate, with respect to each real property instrument and each personal property instrument that may be filed for record in the office of the judge of probate and for indexing of other instruments and documents in the probate office in the discretion of the county commission, and no such instrument shall be received for record in the office of the judge of probate unless the special indexing fee of one dollar ($1) is paid thereon. The special indexing fee shall be in addition to all other fees, taxes, and other charges required by law to be paid upon the filing for record of any real property instrument or personal property instrument, and the recording of other instruments and documents in the probate office in the discretion of the governing body of the county. All special indexing fees so collected shall be deposited into the county general fund.