[Code of Federal Regulations] [Title 40, Volume 21] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR163.10] [Page 164] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 163--CERTIFICATION OF USEFULNESS OF PESTICIDE CHEMICALS--Table of Contents Sec. 163.10 Withdrawal of request for certification pending clarification or completion. In some cases it may be necessary for the Director to notify the petitioner of his proposal to certify that the pesticide chemical does not appear to be useful for some or all of the purposes for which a tolerance or exemption is sought only because the data submitted by the petitioner are not sufficiently clear or complete to justify a finding of usefulness. In such cases the petitioner may withdraw his request for certification pending its clarification or the obtaining of additional data, and no further action will be taken with respect to the making of the certification until the request for certification is resubmitted. Upon the resubmission of the request for certification, the time limitation within which final certification is required to be made will begin to run anew from the date of the resubmission.