I never saw such clauses

Dear Carrie, I have experience from pricing changes both during the negotiation process and during the contract lifecycle. Our clients have especially found this as an effective tool during negotiations to demonstrate risk/work-impact if the other party is requesting terms transferring an extensive part of the risk/work to them. By showing the cost-impact, the incentive for price increase becomes rather obvious which strengthens your negotiation position. Kind regards, Madeleine Willyams - Advokatfirmaet Negota AS, Norway.