Under a proposed rule, EPA would prohibit the use of scientific studies to support new regulations unless the studies’ underlying data is publicly available for independent validation. EPA asserts that the rule is necessary for more transparent rulemakings and to restore public confidence in how the agency regulates. Critics argue that important public health regulations have used confidential data while industry groups note that pesticide registrations rely on confidential business information. EPA is seeking comment on how to incorporate the proposed rule’s transparency requirements into grant decisions and whether exceptions are needed to comply with statutes involving the protection of personal privacy, trade secrets, and national and homeland security information. Although EPA allotted 30 days for public comment, several groups have requested additional time.