well that is not my understanding but i dont think they should be used by anyone. including Tech or cabin crew families. Those seats are for operational crew only and flight attendants spend all there time getting passengers off them on night sectors as it is.
Tech crew families have access to 1st class and business class and economy and Cabin Crew families have access to business class and economy class.
I do not think that operational seats should ever be used by passengers. As for only being used for landing and take off....thats tosh
they will be there for the whole flight and in the way of the crew and the passengers at the exit row seats.
Cant imagine that a passenger who has paid extra for an exit row seat would be happy being crunched up with a staff passenger encroaching on the space they have paid extra for....
Another loopy idea by the lunatics that run Qantas.... No doubt CASA and the travel writers in the media will have a view about it i am sure