Airtags - you are talking c**p.
What I am guessing is that the cash reserves would run the airline until 26 April IF no other income was to come in from the day the memo was released and all flights continued operating. Ie full expenses but no revenue. Days operating revenue was about 3 mths late last year so it has slipped by a couple of weeks which is prob not good.
I am sure they would be required to report to ASX if there last statement said 600mil cash reserves and they have eaten through that in 6mths. When the wage bill is say 7000 employees by 80k/yr = 560 mil /yr the company would be in trouble if they had lost all of that in 6 mths while still operating. Hardly plausible.
Only my opinion