DCINC has said that this is unacceptable and that private driving should conform to service rules
So how would that square with a crew RTBing after a 16hr crew duty day, involving crossing several time zones? Would they have to stay in the mess on landing? And if the mess was full, would Ops book you a hotel room downtown and provide transport?
DCINC has no authority to insist service rules apply to
private driving, or
private anything for that matter - the clue's in the name.