quote:
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4. Costs. Is the seat free, or do you expect the passenger to pay the landing fee, buy lunch, or share all costs.
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Would exercise caution when advertising spare seats like this, see Art 130 of ANO, esp : no information concerning the flight shall have been published or advertised prior to the commencement of the flight other than, in the case of an aircraft operated by a flying club, advertising wholly within the premises of such a flying club in which case all the persons carried on such a flight who are aged 18 years or over shall be members of that flying club.
I just found this on another forum, I'm not sure if it is applicable.
H.