[Code of Federal Regulations] [Title 40, Volume 21] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR121.12] [Page 128] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 121_STATE CERTIFICATION OF ACTIVITIES REQUIRING A FEDERAL LICENSE OR PERMIT--Table of Contents Subpart B_Determination of Effect on Other States Sec. 121.12 Supplemental information. If the documents forwarded to the Regional Administrator by the licensing or permitting agency pursuant to Sec. 121.11 do not contain sufficient information for the Regional Administrator to make the determination provided for in Sec. 121.13, the Regional Administrator may request, and the licensing or permitting agency shall obtain from the applicant and forward to the Regional Administrator, any supplemental information as may be required to make such determination.