[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: 30CFR22.11]

[Page 135-136]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 22--PORTABLE METHANE DETECTORS--Table of Contents
 
Sec. 22.11  Instructions on handling future changes in design.

    All approvals are granted with the understanding that the 
manufacturer will make the detector according to the drawings submitted 
to MSHA which have been considered and included in the approval. 
Therefore, when the manufacturer desires to make any changes in the 
design, the manufacturer should first obtain MSHA's approval of the 
change. The procedure is as follows:
    (a) The manufacturer should write to Approval and Certification 
Center, RR 1, Box 251, Industrial Park Road, Triadelphia, WV 26059, 
requesting an extension of the original approval and stating the change 
or changes desired. With this request, the manufacturer should submit a 
revised drawing or drawings showing changes in detail, together with one 
of each of the parts affected.

[[Page 136]]

    (b) MSHA will consider the application and inspect the drawings and 
parts to determine whether it will be necessary to make any tests.
    (c) If no tests are necessary, the applicant will be advised of the 
approval or disapproval of the change by letter from MSHA.
    (d) If tests are judged necessary, the applicant will be advised of 
the material that will be required.

[Sched. 8C, Oct. 31, 1935, as amended by Supp. 1, 20 FR 2575, Apr. 19, 
1955; 43 FR 12315, Mar. 24, 1978; 52 FR 17514, May 8, 1987; 60 FR 35694, 
July 11, 1995]