Joseph, the selection (I prefer this term) is at all
fairs (this is not about the exhibition, but a fair galleries - an important nuance) of the world.
In the most influential trade fairs usually require that the gallery has existed for some minimum - tnogda fairly long - term, and, of course, watching the work that it intends to submit a gallery.
Even at the Art Moscow Organizing Committee does not accept dossiers galleries, existing at least three years - all this is just information.
Now my opinion - which it stands, is another question
I think that make any sense to arrange an alternative is not fair, it is best to participate in the most prestigious, has long-standing and well-attended fairs. By the way, in my opinion, Art-Moscow better than the Manege, although of course, all this in the abstract, because much depends on the type of artist that you want to display.
"Uncensored" Fair will inevitably be weak and diverse, selection is needed to ensure some minimum quality and /or maintain the ideological line of the fair. Journaling support is not enough, there need strong contacts in the world of contemporary art.