Sentence:  Written evidence that the claimant and any such attorney have agreed to the amount of the attorney 's fees shall <WSD>be</WSD> conclusive upon the Commission : Provided , however , That the total amount of the fees so agreed upon does not exceed 10 per centum of the total amount paid pursuant to the award . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)