The result of the process undertaken in the previous two years, in May 1963 the Integrated Revolutionary Organizations (ORI) came to be called the United Party of the Socialist Revolution of Cuba (PURSC). This was not a simple name change, but the establishment of a rigorous democratic system for entry into its ranks, on the basis of consultation with workers about who could be considered and elected as model workers, and the selection by relevant bodies, from among these workers, of those who should be selected for entry into its ranks.
Based on these principles, intense activity unfolded in workplaces and in other collectives. Based on the first experiences, this task extended to other sectors of Cuban society.
Under the guidance and direction of Raúl, for example, in the eastern mountains, the work of building the Party began following socio-political studies, taking advantage of the structure of the mountain companies, which due to their composition had become effective political-military organizations in these territories.