49.082.  Compensation of certain county commissioners, may be reduced, vote required — training program, attendance required, when, expenses, compensation. — 1.  A county commissioner in any county, other than in a first classification chartered county or a first classification county not having a charter form of government and not containing any part of a city with a population of three hundred thousand or more, shall, subject to any other adjustment otherwise provided in this section, receive an annual salary computed as set forth in the following schedule.  The assessed valuation factor shall be the amount thereof as shown for the year next preceding the computation.  The provisions of this section shall not permit or require a reduction in the amount of compensation being paid for the office of commissioner on January 1, 1997.

  2.  A county commissioner who begins a term after August 28, 2026, shall receive an annual salary computed as set forth in the following schedule.

  3.  In addition to any compensation provided pursuant to subsection 1 of this section, the presiding commissioner of any county not having a charter form of government shall receive two thousand dollars annual salary.

  4.  Two thousand dollars of the salary authorized in this section shall be payable to a commissioner only if the commissioner has completed at least twenty hours of classroom instruction each calendar year relating to the operations of the commissioner's office when approved by a professional association of the county commissioners of Missouri unless an alternative option is approved by the professional association.  The professional association approving the program shall provide a certificate of completion to each commissioner who completes the training program and shall send a list of certified commissioners to the treasurer of each county.  Expenses incurred for attending the training session may be reimbursed to a county commissioner in the same manner as other expenses as may be appropriated for that purpose.

  5.  A county commissioner in any county, other than a first classification charter county or a first classification county not having a charter form of government and not containing any part of a city with a population of three hundred thousand or more, shall not, except upon a two-thirds vote of all the members of the salary commission, receive an annual compensation in an amount less than the total compensation being received for the office of county commissioner or presiding commissioner respectively for the particular county for services rendered or performed on the date the salary commission votes.