In the news, I followed, it was said that one of the causes for the delay of the "False alarm, all clear" message had been the clearance of the particular wordi

In the news, I followed, it was said that one of the causes for the delay of the "False alarm, all clear" message had been the clearance of the particular wording with various authorities, because it hadn't been implemented before. This hints to a set of prefabricated message which are to be selected by this application. However, you may be right on that screen not being all of the selection process in its entirety. Edit: Also, I guess, there's still some kind of message authenticator, which has to be entered in the process?