To provide a means whereby employees of the cities of the state of Idaho may be selected, retained and promoted on the basis of merit and performance of duties, thus affecting [effecting] economy and efficiency in the administration of city government, the city council of any city may, by ordinance, provide for the creation of a civil service system under the provisions herein set forth.
Any city having created a civil service system shall not thereafter abolish such system except as herein provided: notice of date, time and place of first reading of the proposed ordinance to abolish such system shall be published in one (1) issue of the official newspaper of the city not less than ten (10) days immediately preceding the first reading of the proposed ordinance; and, such ordinance shall not be passed unless the same is read at length on three (3) different days at least seven (7) days apart.
Idaho Code § 50-1601