727. A will made in the presence of witnesses is written by the testator or by a third person.
After making the will, the testator declares in the presence of two witnesses of full age that the document he is presenting is his will. He need not divulge its contents. He signs it at the end or, if he has already signed it, acknowledges his signature; he may also cause a third person to sign it for him in his presence and according to his instructions.
The witnesses thereupon sign the will in the presence of the testator.