A company must file tariffs meeting the following criteria:

(1) Tariffs must be on forms available from the commission or on comparable forms approved by the commission.

(a) Tariffs submitted on forms other than those obtained from the commission must conform to the commission-prescribed item numbering format. For example:

(b) A complete list of item numbers is shown in the commission's tariff form.

(2) Tariffs must be filed in loose-leaf format.

(3) Tariffs must be typed or mechanically printed (not handwritten) using at least ten-point type.

(4) Tariffs must be printed on eight and one-half inch by eleven inch paper, with margins of at least one-half inch on each side.