(1) In order to make a will by a secret document, the testator must close up the document on which the writer's full name was written and affix his or her seal thereto, and after the testator has produced the sealed document before at least two witnesses and declares that it is his or her testamentary document, the date of the production of the document must be written on the sealed cover, and then the testator and the witnesses must affix their signatures or names and seals thereto.
(2) A closed document of a will prepared in compliance with the forms mentioned in paragraph (1) must be submitted to a notary or the court clerk within five days from the day on which the date of production of the document has been written down on the cover of the document, and the date of confirmation thereof must be affixed on the part sealed.