Civil Code (Cap. 16), article 854

854. Where the renunciation is made gratuitously by one of the co-heirs in favour of all those co -heirs, whether testamentary or heirs-at-law, upon whom, on failure of the party renouncing, hi s portion of the inheritance would have devolved, it shall not im ply acceptance of the inheritance. Where heirs do not agree as to accepting or renouncing an inheritance.