14 C.F.R. § 437.61
For a nominal or any contingency abort landing of a reusable suborbital vehicle, or for any nominal or contingency impact or landing of a component of that reusable suborbital vehicle, a permittee must use a location that—
[Doc. No. FAA-2006-24197, Amdt. No. 437-0, 72 FR 17019, Apr. 6, 2007, as amended by Doc. No. FAA-2023-1656, Amdt. No. 437-4, 89 FR 76727, Sept. 19, 2024]