It’s not in the loa. Anyone awarded CA prior to LOA signing the pay section of the LOA doesn’t apply to them. It’s the standard withholding pay section in the CBA that applies for those awarded prior based on street CA’s finishing IOE (that went to training after the dec17 bid closed) vs preference/proffer to displace in seniority order on a one for one basis.

The union are keeping track of those affected. Email your rep and the contract compliance committee to see where you sit in the queue for withholding.