30 CFR 7.21 - Purpose and effective date.

Regulations last checked for updates: Feb 09, 2026

Title 30 - Mineral Resources last revised: Jan 27, 2026

View all text of Subpart B [§ 7.21 - § 7.31]

§ 7.21 - Purpose and effective date.

This subpart establishes the specific requirements for approval of brattice cloth and ventilation tubing. It is effective August 22, 1988. Applications for approval or extension of approval submitted after August 22, 1989, shall meet the requirements of this part.

authority: 30 U.S.C. 957.

source: 53 FR 23500, June 22, 1988, unless otherwise noted.

cite as: 30 CFR 7.21