About a schedule

Is this well written?

"This schedule is subject to changes that will be, as far as possible, notified in advance."

Thank you for your help.

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There are two possible meanings here.

Do you mean the changes will be announced 1) as far ahead as possible or 2) the changes will be announced, if possible?

In the first case I would say:

 This schedule is subject to changes that will be announced as far in advance as possible. 

In the second case I would say:

This schedule is subject to changes that will announced in advance, if possible.