Physical containment.
CFR · 2024-01-01 · US · Title 14
(a) (b) (1) Develop the flight hazard area in accordance with § 450.133; (2) Ensure that the launch vehicle does not have sufficient energy for any hazards associated with its flight to reach outside the flight hazard area; (3) Ensure the hazard area is clear of the public and critical assets; and (4) Apply other mitigation measures necessary to ensure no public or critical asset exposure to hazards, such as control of public access or wind placards. (c) (1) A demonstration that the launch vehicle does not have sufficient energy for any hazards associated with its flight to reach outside the flight hazard area developed in accordance with § 450.133; and (2) A description of the methods used to ensure that flight hazard areas are cleared of the public and critical assets.
official document · source cfr-2024 · id 14:§ 450.110