Determination letter needed?

[Guest RONNIE WASEL]

We originally prepared a volume submitter plan back in August of 1998 using the Corbel checklist date 4/10/1997. We did not obtain a determination letter on this plan because the IRS had not opened the determination letter program.

We have since amended the plan onto a prototype plan document.

Do we need to file for a determination letter on the original plan which is a pre-GUST document? Or does the opinion letter on the new prototype document cover it?

Thanks.