What are the rules for using experimental aircraft for commercial purposes?

--
Look at the world today. Is there anything more pitiful? What madness there
is. What blindness. What unintelligent leadership. A scurrying mass of
bewildered humanity, crashing headlong against each other, compelled by an
orgy of greed and brutality. The time must come my friend, when this orgy
will spend itself. When brutality and the lust for power, must perish by its
own sword. -Lost Horizon, 1936