Article 4 Power to deviate
In maintaining the scheduled work, the undertaker may—
deviate laterally from the lines or situations shown on the plan within the limits of deviation for that work shown on that plan; and
deviate vertically from the levels shown on the sections—
to any extent not exceeding 3 metres upwards; and
to any extent downwards as may be found to be necessary or convenient.
The undertaker may in maintaining the scheduled work lay down—
double lines of rails in place of single lines;
single lines of rails in place of double lines;
interlacing lines of rails in place of double or single lines; or
double or single lines of rails in place of interlacing lines.
The undertaker may in maintaining the scheduled work provide within the limits of deviation such number of lines of rails and sidings as may be necessary or expedient.