---
kind: "unit"
title: "18"
title_heading: "Conservation of Power and Water Resources"
key: "chI/subchB/part4/subpartI"
level: "subpart"
label: "Subpart I"
heading: "Application for Preliminary Permit; Amendment and Cancellation of Preliminary Permit"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/18/chI-subchB-part4-subpartI"
sections_count: 5
---

# Subpart I — Application for Preliminary Permit; Amendment and Cancellation of Preliminary Permit

Title 18 C.F.R. — Conservation of Power and Water Resources › Chapter I — Federal Energy Regulatory Commission, Department of Energy › Subchapter B — Regulations under the Federal Power Act › Part 4 — Licenses, Permits, Exemptions, and Determination of Project Costs

## Sections

- [§4.80. Applicability.](/cfr/18/4.80.md)
- [§4.81. Contents of application.](/cfr/18/4.81.md)
- [§4.82. Amendments.](/cfr/18/4.82.md)
- [§4.83. Cancellation and loss of priority.](/cfr/18/4.83.md)
- [§4.84. Surrender of permit.](/cfr/18/4.84.md)