Volume Submitter To Prototype & Gust

[sdix401k]

We are taking over a plan that was using ang age weighted formula on a volume submitter plan. Employer signed gust certification. Employer has now restated plan onto a different document providers non-standadarized document. ( Resatement date from original effective date of plan with Gust amendments.) Any problems with this?? Prior admin is saying that contributions from orig effective date to re-adoption date could be disqualified.

Thanks in advance.