...just this year, and only recently added to the website. You can see them at
http://http://www.usssabaseball.org/...les.Jan.19.pdf
Look at rule 8.07.G. It references "slide or seek to avoid contact". It also includes the phrase "Malicious contact shall supercede all obstruction penalties."
I don't see hurdling explicitly mentioned, but clearly the inspiration for this aspect of the rules is FED. So call the hurdler out!