The extended comment period is only for the part of the proposal that deals with the date by which products would have to have been on the market to be exempt from FDA regulation. Right now, the date in the proposal is 2007, which would mean that every cigar that's come to market since 2007 could be subject to FDA approval. The extension is not for comments on anything else to do with the proposal, just that specific component. You can read more about it here News: Tobacco Groups Push for FDA Regulation Date Fix | The Stogie Guys and you can get information about how to comment here Regulations.gov