SIC landing currency

[beernuts]

Are SIC's required to show 90 day landing currency for passengers for a part 91 operation under day or night (2 pilot airplane)?
What if the flight is under part 135?
If not is there some other requirement?

 

[Tooslow]

part 121 just says 3 landings within 90...That is all I know.

 

[pilotyip]

SIC landing mins 91/135

91 three landing a year, no night currency, must be full stop, must have one acting as PIC with an engine out. Part 135 three landing ever 90 days.