(1) A school district that is designated for required action shall notify the superintendent of public instruction and the state board of education within ten calendar days if it is pursuing mediation with the public employment relations commission in an effort to agree to changes to terms and conditions of employment to a collective bargaining agreement that are necessary to implement a required action plan.

(2) If the parties are able to reach agreement in mediation, the school district shall submit its required action plan according to the schedule outlined in WAC 180-17-020.

(3) If the parties are unable to reach an agreement in mediation, the school district shall file a petition with the superior court for a review of any disputed issues under the timeline prescribed in RCW 28A.657.050. After receipt of the superior court's decision, according to the schedule outlined in WAC 180-17-020.