Is it possible to operate regular, commercial flights from an airport (aerodrome) that is not in the national AIP, and for which there are no charts, maps, terrain information, obstacle information, NOTAMs etc.?
Here in Mongolia there are 23 airports listed in the AIP (ETOD is already collected and published for free) but there is discussion about removing all of them except Chinggis Khaan International Airport (ZMUB). That means, there would be no information available about those airports. Would they still be usable for flight operations?
(Related to this question.)