Pending a final determination as to whether any archaeological or ethnological material, or any article of cultural property, has been imported into the United States in violation of section 2606 of this title or section 2607 of this title, the Secretary shall, upon application by any museum or other cultural or scientific institution in the United States which is open to the public, permit such material or article to be retained at such institution if he finds that—
(1) sufficient safeguards will be taken by the institution for the protection of such material or article; and
(2) sufficient bond is posted by the institution to ensure its return to the Secretary.
Section effective on the 90th day after Jan. 12, 1983, or on any date which the President shall prescribe and publish in the Federal Register, with exceptions, see section 315 of Pub. L. 97–446, set out as a note under section 2601 of this title.