All the transitions on this STAR begin above 10,000 MSL. They don't want slowpokes going 220 KIAS clogging up the works. All they had to do to make the restriction clearer was to add a single word so that it reads:
"NOTE: ONLY TurboJet and Turboprop aircraft capable of 250 KIAS or greater are authorized."
Instead of " NOTE: TurboJet and Turboprop aircraft capable of 250 KIAS or greater are authorized."
Just a single word can make all the difference.