Sec. 5. (a) The number of supervisors of township assistance investigators may not exceed one (1) supervisor for the first four (4) township assistance investigators. If there are more than four (4) township assistance investigators, the township trustee may employ one (1) additional supervisor for each twelve (12) township assistance investigators or major fraction of that number.
(b) The pay for supervisors of township assistance investigators shall be fixed in the manner provided by law for other township salaries.