Solo constituirán áreas de reserva nacionales las zonas de concesiones de petróleo en explotación que reviertan al Estado a virtud de contratos preexistentes, sin perjuicio de lo establecido en la Ley 165 de 1948 .
Ley 18 de 1952 →In force
Article 17
Ley 18 de 1952 · Por la cual se dictan algunas disposiciones en el ramo de petróleos, y se modifican las leyes 37 de 1931 y 160 de 1936.
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