1(1) When new or additional service classifications or rate schedules are to be established, the sheets containing such classifications or schedules shall follow the last sheets in the rate schedule section of the appropriate classification and be given the next consecutive sheet number or numbers. Letter suffixes shall not be used in numbering service classifications or rate schedules.
59(2) When revisions or additions to existing schedules or sheets require more space, one or more sheets shall be issued to which the same sheet number shall be given with a letter suffix; for example, if changes be made in Original Sheet No. 5.2 and more than one sheet is required to show the changed or new matter, the new sheet shall be issued as First Revised Sheet No. 5.2-A, etc.
