989.23—File.
File means transmit or deliver to the Secretary or committee, as the case may be, and such act shall be deemed to have been accomplished at the time:
(a)
Of actual receipt by the Secretary or committee in the event of personal delivery;
(b)
Of receipt at the office of the telegraph company, in case submission is by telegram; or
(c)
Shown by the postmark, in case submission is by mail.