91.109
(b) No person may operate a civil aircraft in simulated instrument
flight unless-

In IMC, the pilot flying may keep the hood on, and thus a safety pilot
would be required. The pilot flying would then log this as simulated
instrument flight, even though he is in actual.

The rule is carved out well enough for the feds, but it is a special
exception, given that simulated instrument conditions are an
artificality anyway.

Jose
--
The monkey turns the crank and thinks he's making the music.
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