Based on the documentation from Apple, they are waiting to get *several* matches, *not only one* (we don't know what is *several* but I don't expect something like <= 3 pictures).
Once the rate has been reached, they ask to a physical team to review the "positive matches", and deliberate if, yes or no, the images are CSAM or not.
If yes, after the manual process, the authorities are called.
Based on the documentation from Apple, they are waiting to get *several* matches, *not only one* (we don't know what is *several* but I don't expect something like <= 3 pictures). Once the rate has been reached, they ask to a physical team to review the "positive matches", and deliberate if, yes or no, the images are CSAM or not.
If yes, after the manual process, the authorities are called.