General Order 128
 Section I
 General Provisions
 
15.1    Changes and Special Installations
 
If, in a particular case or a special type of construction, exemption 
from or modification of any of the requirements herein is desired, the Commission 
will consider an application for such exemption or modification when accompanied 
by a full statement of conditions existing and the reasons why such exemption 
or modification is asked and is believed to be justifiable. It is to be understood 
that, unless otherwise ordered, any exemption or modification so granted shall
be limited to the particular case or special type of construction covered 
by the application.