Marek, as Stefan pointed out, the notes apply to certain releases (that's where we see "from... to"). The Support Packages section shows in what SP the note was delivered.
But keep in mind that such notes usually can't be applied incorrectly even by mistake, If you try to apply a note that is already in the system you'll get a message to that effect.
Since this appears to be answered kindly close the discussion (see this blog).