Certain certification cases require consideration of a minimum flight weight (VMC is one). Depending on how the OEM does it, they may use a minimum flight weight for these purposes which is so low as to be no practical limit on the aircraft; however, this will impose some penalty on normal operations in certain cases, as the weight used may be unrealistically low. There may be cases where the weight assumed is actually greater than, say, the weight which an aircraft with no interior completion and minimum fuel.crew could be at. In that case one would have to arrange the loading and planning to respect the minimum flight weight. However, this would be a landing consideration, and the takeoff would be derived from that, not a direct l;imitation.