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Since updating its data requirements for the registration of conventional, microbial, and biochemical pesticides in October 2007, and for antimicrobial pesticides in May 2013, EPA has identified the need to make a variety of revisions to improve clarity and reduce the frequency of inquiries or confusion related to several technical aspects of the regulations. In particular, EPA is considering several editorial and technical changes, including, for example: (1) correction of scientific units used in the test notes; (2) clarification of information on appropriate test species cited in the test notes; (3) correction of guideline numbers referenced in the tables; and (4) correction of outdated terminology. EPA does not intend for this rulemaking to include any changes that would increase the burden because the changes being considered do not involve requiring new data, or increasing the frequency with which the existing data are required.