Originally Posted by
pandaperth
The new wording is:
NOTE: For flights where First or Business Class is not offered or available, passengers may travel in a lower Class, in the applicable booking code for that lower Class.
Where the applicable booking class for the lower class is not available,
Passengers travelling on First Class Fares may book Y class
Passengers travelling on DONE* Business Class Fares may book B class
Note the the new IONE* products aren't eligible for "B" class (and the extra flexibility that allows)... For them, as I read this, it's either "I" or "L"