Sep.25 (GMM) New Jersey might not host a Grand Prix as scheduled next year, Bernie Ecclestone said on Tuesday.
The F1 chief executive said organisers of the street circuit opposite Manhattan's historic skyline "have not complied with the terms and conditions" of the agreed deal.
However, New Jersey appeared as a conditional date on the draft 2013 calendar, which was leaked inside the Singapore paddock last weekend.
That schedule was set to be ratified by the FIA on Friday.
Ecclestone warned: "We are pretty close to the final deadline. We have got a World Council meeting coming up.
"I think if somebody got behind them it could happen in 2013 because they have come a long way with the circuit."