remains a balance of funds received for the establishment of the commemorative work under this section, the National Medal of Honor Museum Foundation shall transmit the amount of the balance to a separate account with the National Park Foundation for memorials, to be available to the Secretary of the Interior or the Administrator of General Services, as appropriate, in accordance with the process provided in paragraph (4) of section 8906(b) of that title for accounts established under paragraph (2) or (3) of that section.