Guys, it's only public transport when you have fare paying pax.
In other words, if say, an engineering company owns an aircraft and hires the services of a freelance pilot to fly some staff (who do not pay for the air fare), it's not public transport! It's a corporate operation.
All the company pays for is the pilot's services; the aircraft is not hired from a third party (air taxi company) who makes money on it. The pilot although operating freelance is being considered as a company's employee.
Is that clear?