18 CFR § 4.400 - Applicability and purpose.

---
identifier: "/us/cfr/t18/s4.400"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "18 CFR § 4.400 - Applicability and purpose."
title_number: 18
title_name: "Conservation of Power and Water Resources"
section_number: "4.400"
section_name: "Applicability and purpose."
chapter_name: "FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY"
subchapter_number: "B"
subchapter_name: "REGULATIONS UNDER THE FEDERAL POWER ACT"
part_number: "4"
part_name: "LICENSES, PERMITS, EXEMPTIONS, AND DETERMINATION OF PROJECT COSTS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "16 U.S.C. 791a-825r; 42 U.S.C. 7101-7352."
regulatory_source: "Order 141, 12 FR 8485, Dec. 19, 1947, unless otherwise noted."
cfr_part: "4"
---


# 4.400 Applicability and purpose.

This part implements section 30(a) of the Federal Power Act, as amended, and provides procedures for obtaining a determination from the Commission that the facility to be constructed is a qualifying conduit hydropower facility, as defined in § 4.30(b)(26), and thus, is not required to be licensed under Part I of the FPA.

[Order 800, 79 FR 59111, Oct. 1, 2014, as amended by Order 857, 84 FR 7991, Mar. 6, 2019]