1. Regulations
  2. title 30
  3. chapter I
  4. part 33
  5. subpart B
  6. § 33.21

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