Yes, with principles new policy any banked PTO goes away now.
I am not sure how that can be.
It is my understanding that if you have a PTO policy and people earned the PTO they have accrued you are legally obligated to let them use it or pay them for it.
For example: If I am an employee and the policy states I earn 10 hours per month, can have a maximum of 120 hours accrued and I so happen to have 120 hours accrued, they can't just change the policy and I lose all my accrued hours. They have to pay me for those hours or allow me to use them.