Guido,
Yes, that's the box. It's clear from it what is required, but it's not clear what to do if the requirement is not met. It should say you need to continue to make calibration rides until you get 4 that meet the criteria and discard the ones that do not. Perhaps an asterix with a footnote would be the best way to handle it.
It's important because measurers won't even think about it until it happens to them on the course. I've gotten a couple apps with bad calibrations, and the forms they sent included that box with the note. They did nothing about it, and I have to believe part of the reason was there are no instructions about what to do.