14 C.F.R. § 135.395 Large nontransport category airplanes: Landing limitations: Alternate airports.
Title 14 - Aeronautics and Space
No person may select an airport as an alternate airport for a large nontransport category airplane unless that airplane (at the weight anticipated at the time of arrival), based on the assumptions in §135.393(b), can be brought to a full stop landing within 70 percent of the effective length of the runway.
Title 14: Aeronautics and Space
PART 135—OPERATING REQUIREMENTS: COMMUTER AND ON DEMAND OPERATIONS AND RULES GOVERNING PERSONS ON BOARD SUCH AIRCRAFT
Subpart I—Airplane Performance Operating Limitations
§ 135.395 Large nontransport category airplanes: Landing limitations: Alternate airports.
