it was kinda of a joke when i said it was the tower guys facing the"bust"if the red bull zivco missed the "pylon"LOL....The scuttlebut I heard on this was the a/c was temporary based @ oak for one of the red bull races held over the bay.There was light traffic into oakland @ the time and the pilot/tower coordinated the "low pass"to "check" gear.Whether there was an Faa enforcement under the faa catchall reg you site I have no idea...I suspect that on this one there was only counseling on low alt acro...(wing @ greater than 45% bank angle).There are some guys on r/c jets that are employed as atc specialists @ norcal that might know more,but I bet they aint talking....kpc