1. Each circuit clerk, except the circuit clerk in any city not within a county, shall cooperate with the prosecuting attorney and family support division in the investigation and documentation of possible criminal nonsupport pursuant to section 568.040.

2. Other provisions of law to the contrary notwithstanding, for the performance of the duties prescribed in subsection 1 of this section, each circuit clerk, except the circuit clerk in any city not within a county, in addition to any other compensation provided by law, shall receive five thousand dollars per year beginning January 1, 1997. Such compensation shall be payable in equal installments in the same manner and at the same time as other compensation is paid to the circuit clerk.

3. For every year beginning July 1, 1998, the amount of increased compensation established in subsection 2 of this section shall be adjusted by any salary adjustment authorized pursuant to section 476.405.