"Meals and refreshments in reasonable relation to waiting time" is not specifically defined as an objective standard.

That said, the level that has consistently accepted as appropriate by various regulatory authorities in delay situations has been the equivalent of EUR 5.00 (or GBP 5.00 in the UK). Passenger complaints where the airline has provided at least that level of care are rarely upheld unless there are other mitigating circumstances.

The closest official resource available on this specific matter can be found at :

http://www.caa.co.uk/default.aspx?ca...eid=6547#three