Paragraph 15 I1

The operator must give the undertaker reasonable notice of any such claim or demand and no settlement or compromise of the claim or demand is to be made without the consent of the undertaker which, if it withholds such consent, has the sole conduct of any settlement or compromise or of any proceedings necessary to resist the claim or demand. Any difference arising between the undertaker and the operator under this Part of this Schedule must be referred to and settled by arbitration under article 67 (arbitration).