Consider a hypothetical situation where where an unexpected tailwind will cause a flight to arrive at its destination above maximum landing weight. After reviewing all reasonable changes to altitude and airspeed, it is clear that on the flight plan route nothing short of a hold or delay vector would allow for a landing within the weight limits.
The SIC suggests including the dispatcher in the decision, and asking for a delay vector or or hold that adds 8 minutes to the flight.
The PIC elects to land overweight, citing a regulation in FAR 121 that precludes any undue delay to burn fuel. Not a specific regulation, just that there is something like this in there.
Is there a regulation in FAR 121 (or any of the other 14 CFR/FAA regulations that govern the flight) that would be violated by adding distance to the route or a hold in order to facilitate additional fuel burn and a landing within the limitations?