Question about Restube Pfd

According to the Association of Swiss Navigation Offices, the Restube PFD is probably sufficient... at least for SUP. https://www.vks.ch/fileadmin...

I would also be interested in that. According to the certifications, the Restube PFD should be sufficient. @Galaxus it would be great if you could clarify this with, for example, the canton of Bern regarding the Aare :-) A short report on this would certainly please many Aareböötler. Many thanks in advance.