When is black side used?

[RungeKuttaFehlberg]

The BGG English rules mention the white and black sides of radars and barriers. When you place them, they should be placed with white side up. But I can't find when they would be turned over to the black side?

[Ananab Tilps]

The word “black” appears twice in the rules. Neither time is your question answered. So.. weird!

I also checked “flip” and “side” and “white” before giving up.

[Jonchu]

This card places a black Radar and Barrier on the map. Their effects are the same as those of the white ones, except they cannot be removed.

[Thomas]

In Red Notice, the Radar and Barrier tokens are actually never flipped over to the black side during gameplay.

The black side serves a different purpose depending on the token type, primarily functioning as a visual indicator for a deactivated state.

[Monkeyunit]

There are improvements for the FBI agent that lets her place black radar and block tokens,