Dive Summary:

• The USDA first started regulating organic foods in 2002, mandating a preliminary inspection of any farm that wishes to certify itself organic.
• In its first amendment to these regulations, the USDA is planning to require periodic inspections of previously certified farms, totaling about 5% a year.
• Although only a fraction of certified farms will be reinspected, the department insists that 5% is enough to ensure farms are not sneaking any pesticides or other chemicals that would forfeit an organic certification.

From the article:

The U.S. Department of Agriculture said Friday it would require periodic tests of organic food starting next year to help ensure producers aren't using prohibited pesticides, genetically modified organisms or other nonorganic substances.

Under existing USDA regulations, organic-food producers must get an initial inspection before being certified to produce organic food. But the agency hasn't required they get continued periodic testing to ensure their products remain free of nonorganic material.