The legatee or devisee of two legacies or devises, one of which is onerous, cannot renounce the onerous one and accept the other. If both are onerous or gratuitous, he shall be free to accept or renounce both, or to renounce either. But if the testator intended that the two legacies or devises should be inseparable from each other, the legatee or devisee must either accept or renounce both.
Any compulsory heir who is at the same time a legatee or devisee may waive the inheritance and accept the legacy or devise, or renounce the latter and accept the former, or waive or accept both. (890a)