(a) Except as otherwise provided pursuant to § 410.19, the applicant and, if he is a person, the Government which transmitted the application on his behalf, one or both may present a statement or statements in reply to the Commission within thirty days after the time provided for presenting statements in response. A statement in reply shall set forth facts and arguments bearing upon the allegations and arguments contained in the statements in response.

(b) When a statement in reply has been filed, the secretary shall send a copy forthwith to each Government except the Government which presented the said statement in reply, and to all persons who presented statements in response.