I know that a Notice to Interested Parties must be posted for employees at least 10 days before an application for a Determination Letter (in this case a 5307) is filed.

But today I was asked how long the posting must stay up.

I'm *assuming* it can be taking down on the day of the filing.

Anyone know for sure? Thanks for your help.

Off the cuff, I'd recommend leaving it up for 60 days beyond the filing date. If memory serves, 60 days is the outside time limit for interested parties to submit comments to the IRS or DOL.

The interested parties may submit comments to the IRS for 45 days, extended to 60 days if the DOL declines to comment when requested to do so by the interested parties. For this reason, it is common practice to leave the notice up for 60 days.