Complex sentence: The global organizing body (FISA, the ancestor of the FIA) allowed more liberal, negotiated interpretations "back home" and some European Teams, most prominently Rudi Eggenberger, ran questionable vehicles.
Split into simpler sentences: The global organizing body (FISA, the ancestor of the FIA) allowed more liberal, negotiated interpretations "back home". Some European Teams, most prominently Rudi Eggenberger, ran questionable vehicles.