The reversion in favor of the donor only, in any case and under any circumstances, may also be validly established, but not in favor of other persons, except in the same cases and under similar limitations, as prescribed in this title for testamentary substitution.\nThe reversion stipulated by the donor in favor of a third person in contravention of the provisions of the foregoing paragraph, is void, but it shall not cause the annulment of the gift.\nHistory —Civil Code, 1930, § 583.
Puerto Rico Legal Code