Art. 3. In case any branch office is set up after the establishment of the "Kodan" (Public Corporation), the fact of setting up of the branch office shall be registered at the location of the main office within two weeks, while, at the place where the branch office is located, the registration according to paragraph 2 of the preceding Article shall be made within three weeks. Besides, at the place where another branch office is located, the fact of such establishment shall be registered within three weeks.