(a) This section shall apply only in Lamar County.
(b) All duties, responsibilities, and liabilities regarding motor vehicle assessment and ad valorem tax collection heretofore performed by the revenue commissioner shall be transferred to and shall be performed by the judge of probate.
(c) All duties, responsibilities, and liabilities regarding real property sales for failure to pay taxes and subsequent redemption heretofore performed by the judge of probate shall be transferred to and shall be performed by the revenue commissioner.