Can a Manifestor have Sacral Authority?

No, and the reason is definitional rather than a matter of rarity: a Manifestor is a chart with an undefined Sacral and a motor connected to the Throat. If the Sacral were defined, the same chart would be a Manifesting Generator instead. Manifestors therefore have Emotional, Splenic, or Ego Authority — whichever of those centers is defined, in that order.

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This is a useful check when a chart calculator or a description seems to contradict itself. Type and Authority are not independent labels; Authority is derived from the same center definitions that produce the Type, so certain combinations simply cannot occur. A Reflector can only have Lunar Authority. A Generator can never have Ego or Self-Projected Authority, because a defined Sacral outranks both.

If you've seen yourself described as a Manifestor with Sacral Authority, the birth data is almost certainly wrong somewhere — most often the time zone.

Related Questions

Which Authorities can a Manifestor have?
Emotional if the Solar Plexus is defined; otherwise Splenic; otherwise Ego. Those three are the only options.
What Type would a defined Sacral plus motor-to-Throat make?
A Manifesting Generator — the same wiring as a Manifestor but with the Sacral engine added.
Can a Projector have Sacral Authority?
No. Projectors have an undefined Sacral by definition, so their Authority comes from further down the hierarchy.