Sentence:  Nothing in the Title shall be construed as the assumption of any liability by the United States for the payment or satisfaction , in whole or in part , of any claim on <WSD>behalf</WSD> of any national of the United States against any foreign government . 
Meaning of the word marked with <WSD> tags:  as the agent of or on someone's part (usually expressed as "on behalf of" rather than "in behalf of");