The Rugby Football League has terminated Bradford's membership following the club's decision to go into administration.
Marc Green, chairman of the Kingstone Press Championship club, announced on Monday he had placed the Bulls into administration to protect themselves from a winding-up petition brought by HM Revenue and Customs for unpaid taxes.
On Wednesday the RFL announced its decision to withdraw the club's membership and warned they could face automatic relegation to League 1.
In a statement, the governing body said: "As is normal when a club enters administration, the RFL board has today terminated Bradford Bulls Northern Limited's membership of the RFL.
"The RFL is in discussion with the appointed administrators about their plans for the future of the club. The RFL board will consider any proposals put forward by the administrators to secure the future of the club and membership (and the conditions of any membership) of the RFL is then entirely at the discretion of the board.
"As part of exercising its discretion, the RFL board would assess any individual proposed be involved in the ownership or management of the club to ensure that they are a fit and proper person.
"In addition, as part of the conditions of any membership, the RFL board would then determine the appropriate sporting sanction, which could include a points deduction or possible relegation.
"This is clearly a distressing time for supporters, players and employees of Bradford Bulls. We will aim to keep them updated of any progress as and when we can."
Bradford were also put into administration in 2012 and 2014 and tax officials said at a hearing in a Bankruptcy and Companies Court in London last month that the club owes around £350,000.
However, Bradford bosses estimated the debt at nearer £133,000 - and barrister Rowena Page told a judge that more than £100,000 had already been paid.