The Federal Court have today ruled in favour of the Australian Rugby League Commission following St George Illawarra forward Jack de Belin's attempted injunction against the governing body's 'no fault' stand down rule.

The decision means that de Belin is ineligible to play in the NRL for the Dragons until a decision on his criminal matter is finalised; the timeframe of which is uncertain.

"I am very disappointed by the decision," de Belin said. "I have been stood down from my employment as a professional rugby league player because an allegation has been made against me.

"I am innocent and I will continue to vigorously defend the single charge made against me.

"Professional rugby league careers are short lived, I have worked hard to build my career and I have now been stood down at the height of it, without any certainty around the timeframe to return. I am told it could be well into next year.

"This is very difficult for me, and also my family, who I would like to sincerely thank, along with my friends, teammates and staff at the Dragons. Their support has been, and will continue to be, greatly appreciated as I seek to find my way forward."

De Belin will make no further comment on the matter and his legal team will consider the option of seeking leave to appeal.

Dragons Chief Executive Brian Johnston said the club was extremely concerned for Jack's welfare.

"The public discussion and pressure around this circumstance and Jack personally has been extreme," Johnston said. "It has been both unfortunate and unnecessary that Jack has been the focus for a number of issues across the game.

"Jack's welfare has always been, and will continue to be, our number one priority.

"We will continue to provide Jack and his family with the all necessary support they require and consider our options with respect to any potential replacement in the squad.

"We also greatly appreciate the support that we as a club have received from our partners, members and fans throughout this process."