But it still says 20 games of which at least 70% have to be open age.I think the confusion arises because this excerpt quotes "club marks"
That said, the FA seem to be happy to give leeway to CFAs to tweak the rules for 7 to 6 and 6 to 5 candidates, which makes sense as it doesn't really affect them. Whereas when it comes to 5 to 4 they are much more "by the book".