Lega Calcio chief Antonio Matarrese was surprised by the Catania tribunal’s decision to overturn their ban on supporters.
The FIGC’s disciplinary commission had sentenced the Sicilian club to play the rest of their home matches this term at a neutral venue behind closed doors.
That penalty came as a consequence of the February riots at the Sicilian derby with Palermo, which led to the death of chief inspector Filippo Raciti.
However, the TAR civil court has accepted the appeal lodged by 82 fans and decided to allow the tifosi into home games.
"This was unexpected, it is a foul that deserves a yellow card," Matarrese said on Wednesday. "We cannot be pleased, now every regional TAR might follow Catania’s example and cause the system to crash," added the official.
"We conform to the sporting justice system, which provides for three grades of justice. TAR magistrates have a different philosophy, but I confess I don’t understand its usefulness in this case."
Earlier this week, the Italian Senate had approved the new anti-hooliganism laws proposed after the incidents in Catania, as the measures still needed to become permanent despite already being in force inside stadiums.