43 CFR § 3583.4-1 - Leasing units.

---
identifier: "/us/cfr/t43/s3583.4-1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "43 CFR § 3583.4-1 - Leasing units."
title_number: 43
title_name: "Public Lands: Interior"
section_number: "3583.4-1"
section_name: "Leasing units."
chapter_name: "BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR"
subchapter_number: "C"
subchapter_name: "MINERALS MANAGEMENT (3000)"
part_number: "3580"
part_name: "SPECIAL LEASING AREAS"
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. 90c-1, 460n-5, 460q-5, 460dd-2, 460mm-4; 30 U.S.C. 189, 293, 359; 31 U.S.C. 9701; 43 U.S.C. 1201, 1732(b), 1733, 1740; 47 Stat. 1487."
regulatory_source: "51 FR 15256, Apr. 22, 1986, unless otherwise noted."
cfr_part: "3580"
---


# 3583.4-1 Leasing units.

Leasing units may not exceed 640 acres consisting, if the lands are surveyed, of legal subdivisions in reasonably compact form or, if the lands are not surveyed, of a square or rectangular area with north and south and east and west boundaries so as to approximate legal subdivisions, described by metes and bounds and connected to a corner of the public survey by courses and distances. The authorized officer may prescribe a lesser area for any mineral deposit if such lesser area is adequate for an economic mining operation.