U.S. lawmakers discuss a new measure to levy a 10 percent on companies in their country who have a relationship with Cuba, in another attempt to tighten the blockade against the island, according to disclosures released Monday.

Lawyers Mauricio Tamargo and Jason Pobrete are lobbying lawmakers to submit a law that requires a payment of not less than 10 percent as "user fee" to agricultural, telephone, remittances and travel enterprises that have transactions with Cuba, said digital publishing Que Pasa Miami.

The initiative will mainly affect hundreds of thousands of Cuban immigrants, naturalized or not, that maintain ties with relatives on the island through phone calls, remittances and travel.

The measure would also affect U.S. farmers who sell food to Cuba through limited and timely licenses, because trade between the two countries is prohibited by the economic, commercial and financial blockade of Washington against Cuba for over 50 years.

According to estimates of Cuban experts, restrictions during that period have cost the island more than 975 billion dollars, a figure that takes into account the devaluation of the dollar against gold in recent years.