This is a great thread - and very pertinent to me as I am in that hour building phase between having a PPL and being able to use my new found flying skills to earn some kind of living.
If I send an e.mail to a few of my friends inviting them to come and fly for fun at the weekend, and I ask them to share the costs of the flight with me - am I advertising or publishing information about the flight? My interpretation of advertising and publishing is putting information into the public domain - such as through a newspaper, magazine, on a webpage or through some other mass media for any one to read. If I send information just to my friends/acquaintances - is that advertising?
Any astute lawyer types out there care to comment?
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'If all else fails - lower your standards'.