The claimant must demonstrate that the costs were incremental and would not have been incurred by the claimant in the course of its normal business operations, as part of a contractual duty or other obligation.
索赔人必须证明，费用属于增多的开支，不属于索赔人在业务过程中作为合同责任和其他义务的一部分原本会支付的费用。