Transmittal memorandum and the January 5, 1993 Federal Register notice announcing interim regulations and request for comment on Disclosure of Confidential Data to Authorized Representatives of the United States and Potentially Responsible Parties (PRPs).  58 Fed.Reg. 458 (1/5/1993). Transmittal memo issued 1/8/1993.

The interim rule updates statutory references and corrects erroneous citations to the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA, commoly referred to as Superfund) and other environmental statutes. The interim rule is effective January 5, 1993.

• Issuance of Interim Rule: Disclosure of Confidential Data to Authorized Representatives of the United States and Potentially Responsible Parties. 58 Fed.Reg. 458-465, January 5, 1993 (40 CFR Part 2) (PDF)(10 pp, 1 MB)