(a) If, after a reasonable period of negotiations over the terms of an agreement or after a reasonable time following certification of an exclusive representative, no agreement has been signed, the parties may voluntarily submit to mediation. If, however, no agreement is reached between the parties by 90 days prior to the expiration of an existing collective bargaining agreement, or, in the case of a compensation bargaining unit of nonhigher education state employees at least 120 days prior to the expiration date of an existing collective bargaining agreement or in the case of a newly certified representative within 60 days after negotiations have commenced, both parties shall immediately notify the Board of the status of negotiations. (b) If the parties have not voluntarily agreed to enlist the services of a mediator and less than 75 days remain before the expiration of an existing collective bargaining agreement, or, in the case of a compensation bargaining unit of nonhigher education state employees at least 90 days prior to the expiration date of an existing collective bargaining agreement or in the case of a newly certified representative more than 90 days have elapsed since negotiations began, the Board must appoint a mediator if so requested by the public employer or the exclusive bargaining representative. The mediator shall be chosen from a list of qualified persons maintained by the Board upon mutual agreement of the parties or from the American Arbitration Association, and shall be representative of the public.(c) If the labor dispute has not been settled within 30 days after mediation has been requested or less than 60 days remain before the expiration of an existing collective bargaining agreement, the parties jointly or individually may petition the Board in writing to initiate binding arbitration. In lieu of a petition, the mediator may inform the Board that further negotiations between the parties, at that time, are unlikely to be productive and recommend that binding arbitration be initiated. The public employer and the exclusive bargaining representative may initiate binding arbitration at any time by mutual agreement. The arbitrator shall be chosen from a list of qualified persons maintained by the Board upon mutual agreement of the parties or from the American Arbitration Association, and shall be representative of the public.(d) Any costs involved in retaining a mediator to assist the parties in reaching a negotiated agreement shall be paid by the Board. 69 Del. Laws, c. 466, §1; 72 Del. Laws, c. 272, §§ 3, 7; 74 Del. Laws, c. 173, § 2; 76 Del. Laws, c. 178, § 3.;