I think that answer is to both forgive interest on loans for the period that law students are without work AND tie payments to income. If you can only find a job for $45K, then a payment of $150 is probably all that you can afford.
Although, I would like to give credit to the ABA for looking out for lawyers (for once), I am prohibited from doing so because I fear they haven't made much ground in this recent crusade. After all, Access Group (the largest lender of private loans) hasn't even heard about the ABA's latest mission. Go ABA! Keep fighting the good fight for us!