§ 7776.
If in an emergency the President considers it urgent, a temporary fort or fortification may be built on private land if the owner consents in writing.
([Aug. 10, 1956, ch. 1041], [70A Stat. 270], § 4776; [Pub. L. 91–393, § 5], Sept. 1, 1970, [84 Stat. 835]; renumbered § 7776, [Pub. L. 115–232, div. A, title VIII, § 808(d)], Aug. 13, 2018, [132 Stat. 1839].)