(a) Three copies of the complete application shall be filed with the Commission at its principal office.

(b) At least the original of each application filed with the Commission shall be signed in the manner prescribed by Form T-3 (§ 269.3 of this chapter).

(c) The application proper and the exhibits thereto shall be bound on the left side in one or more parts, but without stiff covers. The binding shall be made in such manner as to leave the reading matter legible.