party to institute  further negotiations.  There was no evidence of any  "bad faith" by the employer  in the course of actual negotiations. In addition, it would appear that further impasse procedures were not available to the parties under the Board's decision in Belmond 4/ Community  School District,-  due to the conflict between the union's late certification and the relationship of statutory impasse pro- cedures to the City's budget certification date. Based upon the above facts, it is clear that the parties had reached  a bona  fide impasse upon the completion of mediation on April 29.  Therefore, I find that the changes in wage rates and related  items made by the City Council on June 7, 1976, in accord- ance with the City's last offer in negotiations, were neither a per se violation of the Act nor evidence of bad faith bargaining, and thus did not violate Sections 10.1, 10.2(e) or 10.2(f) of the Act. However, there remains the issue of the job classification change enacted by the Council on April 7, 1976.  This change was enacted while the parties were still involved in the negotiations process, before the parties last joint bargaining session and the two mediation sessions.  As such, the change in job classifications occurred before the parties had reached a bona fide impasse in negotiations. The City argues in its brief that it was under no obligation to bargain over the enacted change in job classifications, since the change took place in a permissive subject of bargaining, and cites as authority  the Board's decision in Bettendorf-Dubugue. 4/  Belmond Community  School District, PERB Case No. 558, (Declaratory Ruling, 1975).

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