Last week, the National Farmers Union and 215 other farm groups that support mandatory labeling called for the implementation date to be moved up. But Peterson told the National Farmers Union convention in Orlando last Saturday that he considers the regulations that USDA has written to implement mandatory labeling unworkable, and he wants the agency to rewrite them so that the labeling regime will be effective. But Peterson also said he has told Arkansas-based meat company Tyson, American Meat Institute, which represents big packers, and the Food Marketing Institute, which represents grocery stores, that mandatory labeling "will happen no later than September of 2008." If agribusiness tries to get Congress to repeal mandatory labeling, Peterson told reporters Thursday, supporters will push for a floor vote and it will pass "by 300 votes." +