Receives earnings as payment for the performance of personal services or official duties out of the general fund of a municipality, or out of any special fund or funds controlled by a municipality, or by an instrumentality thereof, or a participating instrumentality, including, in counties, the fees or earnings of any county fee office; and
However, such persons shall be included as employees to the extent of earnings that are not eligible for inclusion under the foregoing laws for services not of an instructional nature of any kind.
However, any member of the armed forces who is employed as a teacher of subjects in the Reserve Officers Training Corps of any school and who is not certified under the law governing the certification of teachers shall be included as an employee.
40 ILCS 5/7-109