From the UE archives:

This looks like a fine concert programme from 1930, conducted by Paul von Klenau with works by Paumgartner, Wellesz, Toch, Hauer, Schmidt and Kienzl.

But what struck our eye was the notice on the right hand border of the programme:

“By official decree ladies are ordered to remove their hats!”

(Über behördliche Anordnung sind die Damen verhalten, die Hüte abzunehmen!)

Rules are rules!