WASHINGTON, Oct 2: The US Food and Drug Administration said it is having difficulty implementing expansive new rules to improve food safety, nearly two years after President Barack Obama signed the standards into law, because of a lack of funding. FDA chief Margaret Hamburg predicted yesterday that her agency “very soon” will issue new regulations needed to enforce the Food Safety Modernization Act, a sweeping piece of legislation enacted to upgrade the security of the US food supply after a deadly salmonella outbreak in 2009. (agencies)