With all of the changes over the last year or so, I have lost track of the cancel/hold policy for non refundable tickets.

It used to be that you could cancel a non refundable ticket within 24hrs of making the reservation and get a full refund. I think it then went to the ability to put a ticket on hold for 24hrs and have the price guarenteed.

What is the current policy for non refundable tickets? Is it one of these or is it just non refundable?