Environmental Protection Agency Administrator Lisa Jackson signed off on a final rule December 15 easing part of the diesel sulfur program for locomotives and marine diesel fuel. The rule reinstates the ability of locomotive and marine diesel fuel produced from transmix by transmix processors and pipeline operators to meet a maximum 500 ppm sulfur standard outside of the Northeast Mid-Atlantic Area and Alaska and expand the ability to within the Northeast Mid-Atlantic Area if the fuel is used in older technology engines that do not require 15 ppm sulfur diesel fuel and the fuel is kept separately.