David, excellent synopsis of the issue. Nothing trumps the argument of a cost-effective improvement in public safety as a govt lobbying point. I only note that the initial 2011 Part 115 document appeared not to have captured the 11-fatality 2012 balloon accident, but as you pointed out it must have been a major trigger-point.

Additional info and news coverage: https://www.odt.co.nz/regions/north-...-omarama-folds