[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: 30CFR27.11]

[Page 143]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 27--METHANE-MONITORING SYSTEMS--Table of Contents
 
                      Subpart A--General Provisions
 
Sec. 27.11  Extension of certification.

    If an applicant desires to change any feature of a certified system 
or component, he shall first obtain MSHA's approval of the change, 
pursuant to the following procedure:
    (a) Application shall be made as for an original certification, 
requesting that the existing certification be extended to cover the 
proposed changes. The application shall include complete drawings, 
specifications, and related data, showing the changes in detail.
    (b) The application will be examined by MSHA to determine whether 
inspection and testing of the modified system or component or of a part 
will be required. MSHA will inform the applicant whether testing is 
required and the component or components and related material to be 
submitted for that purpose.
    (c) If the proposed modification meets the requirements of this 
part, a formal extension of certification will be issued, accompanied by 
a list of revised drawings and specifications which MSHA has added to 
those already on file.

[31 FR 10607, Aug. 9, 1966, as amended at 52 FR 17515, May 8, 1987]