30 CFR § 28.20 - Certificates of approval; scope of approval.

---
identifier: "/us/cfr/t30/s28.20"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 28.20 - Certificates of approval; scope of approval."
title_number: 30
title_name: "Mineral Resources"
section_number: "28.20"
section_name: "Certificates of approval; scope of approval."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "B"
subchapter_name: "TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS"
part_number: "28"
part_name: "FUSES FOR USE WITH DIRECT CURRENT IN PROVIDING SHORT-CIRCUIT PROTECTION FOR TRAILING CABLES IN COAL MINES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 957, 961."
regulatory_source: "37 FR 7562, Apr. 15, 1972, unless otherwise noted."
cfr_part: "28"
---


# 28.20 Certificates of approval; scope of approval.

(a) MSHA shall issue certificates of approval pursuant to the provisions of this subpart only for individual, completely fabricated fuses which have been examined, inspected, and tested as specified in § 28.10, and have been evaluated by MSHA to ensure that they meet the minimum requirements prescribed in this part.

(b) MSHA shall not issue an informal notification of approval.