Sentence:  Subject to the limitations hereinafter provided , the Secretary of the Treasury is authorized and directed to pay , as prescribed by section 8 of this Title , an amount not exceeding the <WSD>principal</WSD> of each award , plus accrued interests on such awards as bear interest , certified pursuant to section 5 of this Title , in accordance with the award . 
Meaning of the word marked with <WSD> tags:  the original amount of a debt on which interest is calculated