A safety pilot is a required crewmember when the pilot flying is under
the hood. However, when the pilot flying is not under the hood, the
safety pilot is not a required crewmember. That makes him a passenger.

Is there a reg that states that?

It has always been my understanding that if something is not prohibited by
written law, it's not illegal, and therefor permitted.

There is case law, and case law is written (though in the FAA's case,
sometimes I think they make it up as they go along, but don't get me
started). There may be a reg that states it too, but I'm too lazy to
look it up.

In any case, it is =not= true that the only regs are the ones you study.

Jose
--
Humans are pack animals. Above all things, they have a deep need to
follow something, be it a leader, a creed, or a mob. Whosoever fully
understands this holds the world in his hands.
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