Funds accidently omitted from fee disclosure

[BKVB]

We provided fee disclosure for a Plan transferring to a new service provider. The Plan offers Target Date funds - although to date no one has selected. We did not include all the Target Date funds in the initial fee disclosure. I know we need to provide disclosure but wonder if this is subject to the 30 day notice requirement? I am wondering if this would qualify as a "special situation" in the DOL guidance?