Participating Employer failure to sign adoption agreement

[IhrtERISA]

Plan Sponsor of 401(k) plan is filing a VCP submission for other unrelated failures. During course of investigation, it was determined that one of the participating employer never signed an adoption agreement, as required under the terms of the Plan Document.

A retroactive amendment was prepared adding the participating employer, along with a restatement of the Plan's adoption agreement.

We are preparing a VCP under Form 14568 Model VCP Compliance Statement. Would a particular Schedule/form also be required for this error/correction?

Thank you!

[IhrtERISA]

Perhaps Form 14568 - Model VCP Compliance Statement - Schedule 2: Other Nonamender Failures and Failure to Adopt a 403(b) Plan Timely ?