Each of the arbitration parties, even if many, may choose an arbitrator among those registered in the Arbitrators’ Register in the Authority, or among others, within seven Business Days from the date of being notified by the Authority. In the event that none of the parties make such a selection, the Authority shall appoint the arbitrator next in the line among the arbitrators registered at the Authority in accordance with the nature if the dispute, and it shall estimate their fees and submit this estimate to the other party so that in the event that they wish to continue the arbitration procedures they are to deposit those fees in the Authority within the period set by the Authority. In all cases, the Authority shall appoint the third arbitrator next in the line in the Arbitrators’ Register in the Authority within three Business Days with notification of the names of arbitrators to the two parties. It shall estimate the division of the fees to be borne by each party. In the event that one of the parties refuses to pay their share in the fees, notification shall be given to the other party to pay it in the event that they wish to continue procedures and to make such a response within the period set by the Authority.In all cases, if the period set for any of the parties to deposit the fees of the court or the fees of the other party’s arbitrator elapses without them being paid, the Authority shall decide to leave the case on arbitration file.