Thirty days after April 30, 1986, a special indexing fee of four dollars ($4) 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 the recording of other instruments and documents in the probate office in the discretion of the judge of probate of the county, and, on and after such date, no such instrument shall be received for record in the office of the judge of probate unless the special indexing fee of four dollars ($4) 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 for the recording of other instruments and documents in the probate office in the discretion of the judge of probate of the county. All special indexing fees so collected shall be paid into the county’s general fund by the judge of probate.