Civil Code (Cap. 16), article 587

587. The provisions of this Code shall not supersede any other law previously in force with reg ard to any testamentary instrum ent made before the 11th February, 1870, even though on such date t he disponer may have been still alive: Provided that if any such instrument is not valid according to such other law it may, unless it is revoked by the disponer, be maintained under the provisions of this Code, provided it satis fies the requirements thereof. Sub-title I OF TESTATE SUCCESSIONS 166 [CAP. 16. CIVIL CODE §I. OF WILLS Definition of will. 588. A will is an instrument, revocable of its nature, by which a person, according to the rules l aid down by law, disposes, for the time when he shall have ceased t o live, of the whole or of a pa rt of his property. Dispositions by universal or singular title.