This, exactly. To expound on all the great explanations, the 14 hours is from a domicile. So, if the uncovered leg is at an outstation, the trigger starts at the show time of the DH to cover the trip, which in some instances, could be the evening or even afternoon prior to the uncovered leg. Example: 0600 BFE-ATL is uncovered. The only leg that would provide adequate rest is ATL-BFE departing at 1400(show at 1300). You would be due no reroute pay if the leg became open anytime after midnight the day prior.