A pair of Assembly Democrats from Manhattan threw curveballs yesterday at the city’s bid for the 2012 Olympic Games. Deborah Glick reprimanded city officials for keeping secret details of their plans on assuming unlimited liability for cost overruns connected to the games. And Sheldon Silver said it was unlikely the state’s Public Authorities Control Board would honor Mayor Bloomberg’s plea to sign off on the West Side stadium project before the vote in Singapore on a host city July 6.

The control board must approve the stadium – which would be the New York Jets’ home field and a convention center, as well as the main Olympic venue – before construction can begin. The Bloomberg administration has said that if the board does not approve the stadium, officially called the New York Sports and Convention Center, before the International Olympic Committee decides on the host city, then New York will forfeit its chances.

In a television interview with New York 1, Mr. Silver said he did not see the necessity of approving the stadium by July. “I don’t see the necessity, Senator Bruno has indicated he doesn’t see the necessity, and we may not have it before July,” the Assembly speaker said. Joseph Bruno, the Senate majority leader, shares control of the control board with Mr. Silver and Governor Pataki, and the three voting members must all agree for the stadium plan to move forward.

“There are court suits going on that may enjoin further proceedings on it,” Mr. Silver added.

Mr. Bloomberg expressed a greater sense of urgency.

“It is a long process to make our case,” the mayor said in a session with the press yesterday. “I have only just started and I remain optimistic that all three of the people on the Public Authorities Control Board, Shelley Silver, Joe Bruno, and George Pataki, will agree and will approve this process going forward. Without that we have no chance for the Olympics, and the option of waiting until after the Olympics is not a realistic option. I don’t know whether we drop out or we say thank you very much for your consideration, but I don’t know why we would want to embarrass the country and ourselves. If we don’t have the stadium we have no chance for the Olympics. If we have the stadium we have a decent chance. There are five wonderful cities trying, and no one should think if we get the stadium it is a lock.”

A condition for hosting the Olympics is the winning bidder must offer unlimited liability for cost overruns. Ms. Glick filed a request under the Freedom of Information Law for documents disclosing how the New York bid planned to comply with that requirement, since a state law caps liability at $250 million. The city rejected her request earlier this month.

“Deputy Mayor Doctoroff has publicly stated that the city and state governments will not face liability beyond $250 million,” Ms. Glick said in a statement. “Meanwhile, he has kept secret key documents that could shed light on how the IOC’s unlimited liability requirement will be met.”

Calls to Mr.Doctoroff’s spokeswoman, Jennifer Falk, were not returned.

The city did release some documents, including a bid committee agreement and another agreement, known as a joinder, that referred to an unidentified “third party approved in advance” by the United States Olympic Committee, which would be liable “for any financial deficit of the candidate committee, the OCOG or the games.” The acronym OCOG refers to the organizing committee, which for the New York bid is the New York Committee for the Olympic Games, known as NYCOG.

That is the “mysterious third party” that would assume the liability for overruns if New York wins the Games, according to a deputy mayor of Salt Lake City in the 1990s, Brian Hatch.

“Because the city and state can’t have unlimited liability, NYCOG, headed by Mr. Doctoroff, will borrow money from the banks and act as a private entity that will be awarded the games,” Mr. Hatch said. Salt Lake City was host of the 2002 Winter Olympics.

Mr. Hatch said Mr. Bloomberg has referred to that third party, including on February 25 during his weekly radio show.