The country seeks to offer guarantees to employers regarding the low probability of nationalization and the possibility of being part of the country's finances for at least 15 years, he added.
Viñals stressed that Spain currently has 280 companies established on the island, 10 of which are in the Mariel Special Development Zone, about 45 kilometers west of Havana.
The congress, which ends on Friday after three days of sessions under the auspices of the National Organization of Collective Law Firms (ONBC) of Cuba, was attended by delegates from some 15 countries, who discussed issues such as foreign investment in Cuba, international economic and commercial relations, and constitutional issues.
Business advisers, foreign speakers and ONBC lawyers also attended book launches, multimedia and collateral activities, such as visits to a prison and a trial.
Havana, Oct 19 (Prensa Latina) Foreign investment is conceived in Cuba as a pillar of sustainable development in a planned economy with constitutional and legal support, the Spanish lawyer Jose Maria Viñals told Prensa Latina in Havana on Friday. 

