WASHINGTON – Mexico says it will lift $2 billion in tariffs when the U.S. allows Mexican trucks back across the border, but a pilot program isn’t going to cut it any more.

The Journal of Commerce quoted a Mexican NAFTA official as saying Mexico "is not willing to take" a pilot program anymore.

He said a demonstration project similar to the one in place during the Bush administration can be defunded by Congress at anytime. "We need a program that is permanent, that has certainty, and complies with NAFTA. And we’re not willing to accept anything less than that."

At the behest of labor unions, the Democratic Congress cancelled the Bush demonstration program shortly after Obama took office.

Mexico then imposed retaliatory tariffs on about 100 U.S. imports, prompting the White House to begin working on a new program allowing Mexican trucks to haul beyond the longstanding 25-mile restriction zone.

At last check, the Obama Administration said it was "very close" to a plan that would resolve the trade dispute, but Mexican patience is obviously wearing thin.

"Mexico will continue to avail itself of all legal means to achieve full compliance by the United States under its commitments under the (North American Free Trade Agreement)," said the Mexican Embassy in a statement.