My high school son (senior) is traveling east for a recruiting trip. The university he's visiting will have a few runner competing at a small meet at a nearby university while he's in town. Can he compete unattached? In the past the meet has also hosted a Open race with many unattached runners (but most looks the be redshirt college athletes). Would there be any violations if he ran unattached in this meet? Especially since the university he's visiting will have a few (second tier) athletes competing there as well.