(a) Subject to paragraph (c) of this section, two duplicate originals and fifty copies of the application and of any supplemental application, statement in response, supplemental statement in response, statement in reply and supplemental statement in reply shall be delivered to either secretary. On receipt of such documents, the secretary shall forthwith send one duplicate original and twenty-five copies to the other secretary.

(b) Subject to paragraph (c) of this section, two copies of such drawings, profiles, plans or survey, maps and specifications as may be necessary to illustrate clearly the matter of the application shall be delivered to either secretary and he shall send one copy forthwith to the other secretary.

(c) Notwithstanding paragraphs (a) and (b) of this section, such additional copies of the documents mentioned therein as may be requested by the Commission shall be provided forthwith.