The agreement is no longer 'valid' under international law.
My passport is still 'valid'. [=it has not expired yet]
There is no 'valid' reason to proceed with the change.
(..) in advance for a year... but if you will refer to the rules and regulations manual we sent you... you will see that unless there is a valid excuse for prolonged absence... your tuition will be forfeit. She's dead. Tell that fucking kid to do a little work around here! Clean up! (..)1994 Léon: The Professional