Vehicle in question is 2007 Chrysler Town and Country 3.3 v6

I just dropped the gas tank to replace the fuel pump and accidentally snapped off one of the nipples on what I assume is an evap or vent line?  it goes up to the filler neck hose.  I need to know if its essential this is repaired or not.  I believe I can repair it, but the off chance I can't, is it a big deal if its not re-attached?  I have no idea with these new vehicles with their emission crap.  I know on an older car its no big deal if the vent line is put back on or not.  

Here's the rest of the details from the tail end of the last forum I was asking the same question:

I got the tank off easily.  Got fuel lines disconnected easily as well as the electrical connectors.  But there was one line, ( I am assuming is an evap line?  I'm not really sure on all of these newer cars.  I'm use to working on the older ones.) that went out and up to the filler tube that broke off at the nipple on the tank.  There happens to be 3 other lines that come out of this place on the tank.  But this one that happened to break off goes up to the filler tube.  Its not the fuel line or any of the emission lines going towards the front of the car.  Is this some sort of vent line?  Will there be any issues if its not connected?  (I've been looking up ways to fix it, since the geniuses who made the tank did not make the part separate.  You have to buy a whole new tank supposedly.)  I think I can use a very small metal line I can pickup from Ace hardware and some epoxy to remake the nipple, but if it wont actually cause any harm in leaving it off, I'd like to know.

(Like I said, I am no expert when it comes to these newer cars and the emissions crap on them.  I know some of the older stuff I've helped work on, you could literally just leave the vent line hanging off the tank and not worry about re attaching it.  But I have no idea if that is what this line is for or what the consequences are if I dont fix it.)  Id be relieved if I could just leave it, but I definetly want to know before I assemble the tank and remount it. I've got a few days before the new pump comes in, so I've got time to hear about what I need to do.

Thanks again everyone for the previous replies and I hope you all had a great Christmas and New Year!

-Jeremiah