[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR33.21]

[Page 156]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 33--DUST COLLECTORS FOR USE IN CONNECTION WITH ROCK DRILLING IN COAL MINES--Table of Contents
 
                 Subpart B--Dust-Collector Requirements
 
Sec. 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.

[[Page 157]]