EPA is extending the effective date for a final rule that appeared in the Federal Register of January 12, 2017 (82 FR 3641; FRL-9957-81) from  May 12, 2017 to August 14, 2017. That rule established final reporting and recordkeeping requirements for certain chemical substances when they are manufactured or processed at the nanoscale as described in that rule. Specifically, the rule requires persons that manufacture (defined by statute to include import) or process, or intend to manufacture or process these chemical substances to electronically report to EPA certain information, which includes insofar as known to or reasonably ascertainable by the person making the report, the specific chemical identity, production volume, methods of manufacture and processing, exposure and release information, and existing information concerning environmental and health effects. The rule involves one-time reporting for existing discrete forms of certain nanoscale materials, and a standing one-time reporting requirement for new discrete forms of certain nanoscale materials before those new forms are manufactured or processed.