Regulations last checked for updates: Nov 22, 2024

Title 30 - Mineral Resources last revised: Nov 19, 2024
All TitlesTitle 30Chapter IPart 33Subpart B - Subpart B—Dust-Collector Requirements
View all text of Subpart B [§ 33.20 - § 33.23]
§ 33.21 - Modification of test equipment.

For test purposes the unit or system may be modified, such as by attaching instruments or measuring devices, at MSHA's discretion; but such modification shall not alter its performance.

authority: 30 U.S.C. 957,961
source: Schedule 25B, 25 FR 6473, July 9, 1960, unless otherwise noted.
cite as: 30 CFR 33.21
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