'Provided that' followed by 'no sooner'

I came across this odd-phrased (to my ear at least) sentence in a text I'm proofreading, would appreciate your opinion:

"... the settlement agreement may be executed at any stage of the bankruptcy proceedings, provided that no sooner than the list of creditors is approved"

Is it OK? I would have used a ‘dummy’ subject or rephrased it completely.

It is not grammatical as is, and I suspect that either some words got left out or someone attempted to modify it from one phrase to another, but accidentally left in part of the original. A possible correction might be "... provided that this occurs no sooner than ...".