Air Passenger Duty "should be devolved as soon as possible", and separately from less straightforward powers.
That's the view of Edinburgh airport bosses who want to capitalise on the tourism momentum of 2014.
It's claimed scrapping the 'passenger' tax could generate around £200million for the Scottish economy.
Lord Smith's Commission recommended the move, along with transferring various tax, revenue-raising and other constitutional matters.
Gordon Robertson, from the company says the change can't come quickly enough:
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