Heather Zichal, deputy assistant to the president for energy and climate change, said June 25 that the administration is committed to issuing an Interior Department rule to regulate fracking on federal lands by the end of the year. The Interior Department announced June 22 that it would extend the public comment period 60 days, to mid-September, to accommodate extensive feedback on the proposed rule. The May 11 proposed rule would require public disclosure of chemical additives with provisions to protect a company’s proprietary information.