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Improvements had been made in water storage and properties might not need council infrastructure for power and sewerage, he said.
"There are major opportunities with new technology, beyond the grid."
However, the city’s district plan was zone-based, rather than needs-based, potentially getting in the way, he said.
Mayor Aaron Hawkins dismissed this as a "survivalist fantasy".
Such ideas tended to be promoted by land-supply libertarians who believed in being allowed to do whatever they liked on their land, he said.
Development still put pressure on the overall system.