This chapter applies to permanent full-time police officers and fire fighters in cities having a population of more than eight thousand, and to all appointive permanent full-time employees in cities having a population of more than fifteen thousand except:
Iowa Code § 400.6
83 Acts, ch 186, §10103, 10201; 86 Acts, ch 1138, §3; 88 Acts, ch 1058, §1; 97 Acts, ch 162, §3