Yup.
My old man wanted to import a Dakota in the '70s (when they were still plentiful and cheap) and do the odd charter but DCA or whatever it was then refused it, saying it was a 'commercial aircraft' with such capacity as could be used to compete with the incumbents.
Yup... a Dak competing Sydney - Melbourne against 727s...
Here's VH-ECF:
http://www.airliners.net/open.file/0190708/M/
Cute little fing, innit??