The EPA released a final rule June 28 requiring gasoline sellers to clearly label pumps which offer the E15 blend (15 percent ethanol) and to warn customers about vehicle-fuel compatibility. In addition to the labeling provisions, the rule calls for the tracing of E15 as it moves through the supply chain. With this provision, the EPA hopes to ensure that ethanol is properly blended as labeled and will include a survey of gas pumps to ensure that E15 pumps are properly labeled. The rule modifies the Reformulated Gasoline Program as well, to allow producers to certify their batches of E15 as meeting the program's standards.