(1) When a change of the
same character is made in all or in substantially all rates in a tariff or
supplement or a page thereof, that fact and the nature of such change may be
indicated in distinctive type at the top of the title page of such issue, or at
the top of each page, respectively, in the following manner: "All rates in
this issue are increases," or "All rates on this page are reductions
except as otherwise provided in connection with the rates."
(2) Under this rule the
appropriate symbol from the tariff's approved symbols page must be used to
symbolize a rate in which no change has been made. This symbol must not be used
for any other purpose.