COMMISSION REGULATION (EU) No 255/2010 (which I hadn't found when I posted above) sets out the responsibilities. It also says, under performance monitoring:
"Member States shall ensure that where adherence to ATFM
departure slots at an airport of departure is 80 % or less during
a year, the ATS unit at that airport shall provide relevant
information of non-compliance and the actions taken to
ensure adherence to ATFM departure slots. Such actions shall
be indicated in a report to be submitted by the Member State
concerned to the Commission."
So you have to fall below 80% even to get your wrist slapped! Though I do notice that Manch gets a mention as a bad boy in the 2010 report.
