(a)
When a function, power, or duty or an activity of a department or agency of the Department of Defense is transferred or assigned to another department or agency of that department, balances of appropriations that the Secretary of Defense determines are available and needed to finance or discharge that function, power, duty, or activity, as the case may be, may, with the approval of the President, be transferred to the department or agency to which that function, power, duty or activity, as the case may be, is transferred, and used for any purpose for which those appropriations were originally available. Balances of appropriations so transferred shall—
(1)
be credited to any applicable appropriation account of the receiving department or agency; or
(2)
be credited to a new account that may be established on the books of the Department of the Treasury;
and be merged with the funds already credited to that account and accounted for as one fund. Balances of appropriations credited to an account under clause (1) are subject only to such limitations as are specifically applicable to that account. Balances of appropriations credited to an account under clause (2) are subject only to such limitations as are applicable to the appropriations from which they are transferred.