Pace, simple.
Weaver was not the PIC when it came to the insurance company, the owner or the ferry company, he had nominated another individual who met all the requirements.
As the other person was the PIC, he had no duty to notify the FAA, the only tenuous link there is, is Weaver's name on the flightplan, all the other paperwork had the other individual on it so as far as the owner, FAA and insurance company was concerned all was legal.
All Weaver has to say to any involved here was that "his office" made a minor mistake on filing the flightplan.