Edited sentence: For the people of Western Sahara, pre-1975 Spanish cards are the main proof that they were Saharaui citizens as opposed to recent Moroccan colonists.Some Basque nationalist organizations are issuing para-official identity cards (Euskal Nortasun Agiria) as a means to reject the nationality notions implied by Spanish and French compulsory documents.Then, they try to use the ENA instead of the official document.They would be thus allowed to vote in an eventual self-determination referendum