YES
My buddy was in a USSA comp for shits and giggles. He through down in the rails, with both way 4s, k-Feds etc. he threw some steezy 540s on the jumps. He was slaying of his current skill level. Anyway this little shit straight slid all the boxes, pencil 360d the first jump and through an ugly ass cork 7 off the last (kid was primarily an aerialist). Anyway that kid and his entire ski team pretty much had that exact same run. So my friend got like 7th. Anyway the next day he through some flat 3s and a backy off the jumps determined to do better, and this bitch comes up to him and says
"Hey you have to be certified to do inverts!!! Your disqualified". Completely killed my friends interest in competing. That was a couple seasons ago too and since then he has only done a gaper day rail jam.