So I checked out the Chattahoochee National Forest website. Found a link to the
original order.
The order regarding approved containers simply states . Doesn't point to any list of approved canisters.
I'm sure anyone making a good faith attempt at following the regulations wouldn't be getting a ticket.
Perhaps the only thing that might cause some issues would be the use of a Ursack. The IGBC website indicates that certain
Ursacks now have IGBC certification, but because it's not made of "solid" material would not meed Chattahoochee National Forest regulations.
On a side note, I find it interesting that the Beridkade canisters are NOT IGBC certified, but many places out west (Yosemite as an example) approve them for use.