when the weather minimums are below basic VFR. when the associated control tower is in operation.  when the associated Flight Service Station is in operation.

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Within the Mode C Veil, remote pilots are exempted from needing airspace authorization under 14 CFR part 107.41 The Mode C Veil is an exemption from remote ID requirements.  Traditional aircraft within the Mode C Veil are required to be ...

Class A is not charted. A solid and dotted magenta line A solid gray line

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The airspace reverts to Class E or a combination of Class E and G airspace during the hours the tower is not in operation.  The airspace designation normally will not change.