A handful of entrepreneurs have quietly formed communist Cuba’s first private small business association, testing the government’s willingness to allow Cubans to organize outside the strict bounds of state control.

More than a half million Cubans officially work in the private sector, with tens, perhaps hundreds, of thousands more working off the books. Cuba’s legal system and centrally planned state economy have changed little since the Cold War, however, and private business people are officially recognized only as “self-employed,” a status with few legal protections and no access to wholesale goods or the ability to import and export.