Hello Jeff,
Although I don't have knowledge to provide much help with your topic I wanted to reply in this thread to ask that you post your experience as it develops. My wife and I will be moving to Nova Scotia in the summer and I to am interested in earth bag building. I would love to hear how the process goes, share ideas or, if possible, help out.
The best advice I can give is that the local permit Office can either be your best friend or your worst enemy. Engage them from the start. If you have researched the topic and show both the knowledge and the drive/ability to finish the project they will (most likely) enjoy guiding you on your build. If you walk in with only vague ideas or, if they think you don't have the resources or ability to finish something, they will stop you there as no one wants the half completed walls of dreams littering the landscape. If they have concerns or simply say "no" then it is easier to compromise/plead with them than it would be if someone surprised you with a stop work or demolition order. The worst thing you can do to bureaucrats is to make them feel useless, dumb or that you are attempting to mislead or sidestep them. They may be useless and dumb but there is power behind that title...
Either way: good luck!
Cheers,
Gregory