The demonstrated crosswind component is purely a matter of how strong your landing gear is.
The factory test pilot demonstrated he could land the aircraft in crosswind of X knots WITHOUT any crosswind compensation and that the landing gear did not bend.
This is NOT an aerodynamic limit.
This aerodynamic limit is to be found elsewhere in the FAR and it requires that the aircraft is controllable with a crosswind of 20% of the stalling speed (from memory, may be slightly different).