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I highly doubt it, there's no official grading of courses, just some are faster than others, and while there is some wording giving a little discretion to organisers, its unlikely they'll spend that much time worrying about those that are of interest in the seeding end of the race...
The only thing counting in the favour of those unprepared to travel to the V718 to get a qualifying time, is that a slower course will put a large number of PB hunters off so the race interest is limited to those who want to say they took part in the national 10 and those actually competing.
How do qualifying times work? Is it based on the course?
I believe the men's Nat 10 course is quite slow - So would a fast qualifying time from the same course trump a quicker time from a different, faster course?