As used in this chapter, the term:
who receives payment for performance of personal services from the state or any department, bureau, institution, board, or commission of the state or from a county, city-county, or city board and who is employed in a position normally requiring actual performance of duty during not less than nine months of the year. "Employee" shall not include members of the Teachers Retirement System of Georgia, members of the Public School Employees Retirement System, any person on the payroll of a third party with whom an employer has contracted for the provision of such person's services, or any person classified by an employer as other than a common law employee for federal tax purposes, even if a court, tribunal, or administrative agency determines that such person is a common law employee and not an independent contractor for federal tax purposes; or
OCGA § 47-2-1