Creating a clipping plane flipped?


If this:

import rhinoscriptsyntax as rs

rs.AddClippingPlane( rs.WorldXYPlane(), 5.0, 3.0 )

creates a clipping plane clipping objects from below, how can I create a flipped one mirrored to this one to clip them from above.

Apparently mirror is a solution but how to initially create it flipped?


Invert (flip) the plane first…?