130R180. A separate class is hereby prescribed for all property included in Class 1 in Schedule B acquired after 6 December 1991 by a taxpayer that at the time of the acquisition is a common carrier owning and operating a railway, and that is(a) railway track and grading, including components such as rails, ballast, ties and other material;
(b) a bridge, culvert, subway or tunnel that is ancillary to railway track and grading; or
(c) railway traffic control or signalling equipment, including switching, block signalling, interlocking, crossing protection, detection, speed control or retarding equipment, but not including property that is principally electronic equipment or systems software therefor.