Sec. 106 of Patriot Act:

when the United States is engaged in armed hostilities or has been attacked by a foreign country or foreign nationals, [the Attorney General may] confiscate any property, subject to the jurisdiction of the United States, of any foreign person, foreign organization, or foreign country that he determines has planned, authorized, aided, or engaged in such hostilities or attacks against the United States; and all right, title, and interest in any property so confiscated shall vest, when, as, and upon the terms directed by the President, in such agency or person as the President may designate from time to time, and upon such terms and conditions as the President may prescribe, such interest or property shall be held, used, administered, liquidated, sold, or otherwise dealt with in the interest of and for the benefit of the United States, and such designated agency or person may perform any and all acts incident to the accomplishment or furtherance of these purposes

Sec. 412 of Patriot Act

`(1) CUSTODY- The Attorney General shall take into custody any alien who is certified under paragraph (3).

`(2) RELEASE- Except as provided in paragraphs (5) and (6), the Attorney General shall maintain custody of such an alien until the alien is removed from the United States. Except as provided in paragraph (6), such custody shall be maintained irrespective of any relief from removal for which the alien may be eligible, or any relief from removal granted the alien, until the Attorney General determines that the alien is no longer an alien who may be certified under paragraph (3). If the alien is finally determined not to be removable, detention pursuant to this subsection shall terminate.

`(3) CERTIFICATION- The Attorney General may certify an alien under this paragraph if the Attorney General has reasonable grounds to believe that the alien--

`(A) is described in section 212(a)(3)(A)(i), 212(a)(3)(A)(iii), 212(a)(3)(B), 237(a)(4)(A)(i), 237(a)(4)(A)(iii), or 237(a)(4)(B); or

`(B) is engaged in any other activity that endangers the national security of the United States.

`(4) NONDELEGATION- The Attorney General may delegate the authority provided under paragraph (3) only to the Deputy Attorney General. The Deputy Attorney General may not delegate such authority.