CFR > Title 18 - Conservation of Power and Water Resources > CHAPTER I—FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY > SUBCHAPTER B—REGULATIONS UNDER THE FEDERAL POWER ACT (parts 4 to 50) > PART 4—LICENSES, PERMITS, EXEMPTIONS, AND DETERMINATION OF PROJECT COSTS > SUBPART I—Application for Preliminary Permit; Amendment and Cancellation of Preliminary Permit (§4.80 to §4.84)