Posse Herrera Ruiz acted as legal counsel to Sociedad Concesionaria Vial Montes de María S.A.S. and its sponsor Sacyr Concesiones Colombia S.A.S. in the offering by Patrimonio Autónomo Montes de María of COP$760 billion of its senior secured UVR indexed notes due 2045, the first social bond for an infrastructure project in Latin America. The issuance is backed by the U.S. International Development Finance Corporation (DFC).