On May 2, 2013, EPA published a proposed rule and a direct final rule that would amend its 2013 cellulosic requirement published on August 15, 2013. The rules are available here and here.
Through these actions, EPA is proposing a revised and reduced cellulosic standard for 2013 of 810,185 gallons. As EPA explains, the direct final rule will be "effective on July 1, 2014 without further notice, unless EPA receives relevant adverse comment by June 2, 2014. If EPA receives relevant adverse comment, [it] will publish a timely withdrawal of this direct final rule in the Federal Register informing the public that this rule will not take effect."
EPA also explains that the proposed rule and direct final rule follow from EPA having granted petitions for reconsideration of the 2013 cellulosic biofuel standard by API and AFPM. Further, EPA explains that it granted the petitions because KiOR, which was "one of the two companies that EPA expected to produce cellulosic biofuel in 2013 announced soon after EPA signed its final rule that it intended to produce substantially lower volumes of cellulosic biofuel in 2013 than it had earlier reported to EPA. Since the cellulosic biofuel standard was based on EPA's projection of cellulosic biofuel production in 2013, EPA deemed this new information to be of central relevance to the rule, warranting reconsideration. On reconsideration, EPA is directed to base the standard on the lower of 'projected' production of cellulosic fuel in 2013 or the cellulosic biofuel applicable volume set forth in the statute. Since data are available to show actual production volumes for 2013, EPA's 'projection' and final rule are based on actual cellulosic biofuel production in 2013."