The ratios don't call for parking airplanes. It's block hours. Nothing stops them from parking mainline or regional planes now, or in the new TA. But the new TA does control block hours, and the current TA does not. The list of acceptable circumstances is in the contract. Delta controls the CPAs. Those are not out of their control. They control DCI block hours right. That is not out of their control. When I was at CoEx, Continental chucked extra block hours and slashed block hours all the time.