Under 14 CFR § 107.25, operating a small UAS from a moving land or water-borne vehicle is permitted only if —

Why: 14 CFR § 107.25(b) permits operation from a moving land or water-borne vehicle only when "the small unmanned aircraft is flown over a sparsely populated area and is not transporting another person's property for compensation or hire." Operation from a moving aircraft is prohibited outright under § 107.25(a).

• Invents a speed threshold that does not appear in the regulation; § 107.25(b) conditions the operation on population density and compensation/hire status, not on how fast the vehicle is moving.
• Focuses on who is riding in the vehicle rather than the actual conditions § 107.25(b) imposes (a sparsely populated area and no compensated property transport).