Civil Code (Cap. 16), article 782

782. (1) Saving the provisions of article 743 and the articles following, a will may be revoked, wholly or in part, by a subsequent will. (2) It may also be revoked by any other act received by a notary with the formalities required for the execution of notarial act s, whereby the testator personally or through an attorney speciall y authorized, declares that he rev okes his will, wholly or in par t. Implied revocation of secret will.