Section 90
SEC. 90. Before the executor or administrator of a deceased owner of registered land or any estate or interest therein shall deal with the same, he shall file in the office of the register of deeds a certified copy of his letters of administration, or if there is a will, a certified copy of the same and of the letters testamentary, or of administration, with the will annexed, as the case may be, and shall produce the duplicate certificate of title, and thereupon the register of deeds shall enter upon the certificate and the duplicate certificate a memorandum thereof with a reference to the letters or will and letters by their file number, and the date of filing the same.