(1) Upon the occurrence of a labor dispute, one party to labor relations shall notify thereof to the other party in writing.
(2) Any industrial action shall not be conducted without completing arbitration procedures (excluding the arbitration procedures after a decision is made to end the arbitration pursuant to Article 61-2) as referred to in Sections 2 through 4 of Chapter V; provided, this shall not apply to cases where arbitration is not finished within the period as provided in Article 54 or where an arbitration award is not made within the period under Article 63. <Amended on Dec. 30, 2006>