Legally, under which part of operations are there no mandated takeoff minimums?

Part 91 of the Federal Aviation Regulations governs general aviation operations, which includes a wide range of aircraft operations such as private flying and some commercial flying that does not involve scheduled air services. One of the key features of Part 91 is the absence of mandated takeoff minimums. This means that pilots operating under Part 91 have the flexibility to make decisions regarding takeoff based on their own assessment of the weather conditions, aircraft limitations, and personal judgment, rather than adhering to specific regulatory minimums.

In contrast, Parts 121 and 135, which regulate airlines and air taxi operations respectively, impose stricter requirements, including defined takeoff minimums. These regulations are put in place to ensure a higher standard of safety for commercial passenger operations. Part 125, which pertains to large aircraft operations that are not covered by Part 121 or Part 135, also includes regulations that may impose minimums based on the complexity and safety of operations.

Therefore, the correct association of no mandated takeoff minimums is exclusive to operations conducted under Part 91.