43 CFR § 3140.31 - Conversion applications.

---
identifier: "/us/cfr/t43/s3140.31"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "43 CFR § 3140.31 - Conversion applications."
title_number: 43
title_name: "Public Lands: Interior"
section_number: "3140.31"
section_name: "Conversion applications."
chapter_name: "BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR"
subchapter_number: "C"
subchapter_name: "MINERALS MANAGEMENT (3000)"
part_number: "3140"
part_name: "LEASING IN SPECIAL TAR SAND AREAS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 181  30 U.S.C. 351-359; 43 U.S.C. 1701  Pub. L. 97-78, 95 Stat. 1070; 42 U.S.C. 15801, unless otherwise noted."
regulatory_source: "89 FR 30988, Apr. 23, 2024, unless otherwise noted."
cfr_part: "3140"
---


# 3140.31 Conversion applications.

A plan of operations to convert an existing oil and gas lease or valid claim based on a mineral location to a combined hydrocarbon lease must have been filed on or before November 15, 1983, or prior to the expiration of the oil and gas lease, whichever was earlier, except as provided in § 3140.12.