Except as otherwise provided in this chapter, the personnel employed in connection with, and the assets, liabilities, contracts, property, records, and unexpended balance of appropriations, authorizations, allocations, and other funds employed, held, used, arising from, available to, or to be made available in connection with the functions and offices, or portions thereof transferred by this chapter, subject to section
1531 of title
31, shall be transferred to the Secretary for appropriate allocation. Unexpended funds transferred pursuant to this subsection shall be used only for the purposes for which the funds were originally authorized and appropriated.