Nontransport category airplanes: Landing limitations: Alternate airport.

CFR · 2024-01-01 · US · Title 14

No person may list an airport as an alternate airport in a dispatch or flight release for a nontransport category airplane unless that airplane (at the weight anticipated at the time of arrival) based on the assumptions contained in § 121.203, can be brought to a full stop landing within 70 percent of the effective length of the runway.

official document · source cfr-2024 · id 14:§ 121.205