This policy predates the AF accident, it just hadn't taken effect at that time owing to the lead time.
It may be the case that in the future ad-hoc charters will once again feature in the programme, but for now the focus is entirely on the BAW001/2, 273/2 and, in the near future, 003/4 flights - which are where the profits were made even in the days of extensive ad-hoc work.
The fleet is keen and ready to carry out the work as soon as the board see fit to give the green light, but equally can see the need to get the prime flights on a firm footing before stretching the operation again.